User:JHunterJ/Articles under the category Birds by location
Using
WP:AWB, I generated this list of all articles under (recursively) Category:Birds by location
. Sorted alphabetically.
- ‘Akeke‘e
- ‘Elepaio
- ‘Eua Rail
- ‘Ōma’o
- Aammiq Wetland
- Abacot Ranger
- Abberton Reservoir
- Abbott's Babbler
- Abbott's Booby
- Abd al-Kuri Sparrow
- Abdim's Stork
- Aberdare Cisticola
- Abernethy Forest
- Aberrant Bush Warbler
- Abert's Towhee
- Abrolhos Painted Buttonquail
- Abyssinian Catbird
- Abyssinian crimsonwing
- Abyssinian Ground Hornbill
- Abyssinian ground thrush
- Abyssinian Longclaw
- Abyssinian Roller
- Abyssinian thrush
- Abyssinian Woodpecker
- Acacia Tit
- Acadian Flycatcher
- Aceros
- Acorn Woodpecker
- Acre Antshrike
- Adamawa Turtle Dove
- Adams Island, New Zealand
- Adelaide's Warbler
- Adelaide and Mary River Floodplains
- Adelaide Ornithologists Club
- Adele Island (Western Australia)
- Adélie penguin
- Admiralty Bay (South Shetland Islands)
- Adrian Darby
- Adzebill
- Aepyornis
- Afep pigeon
- Afghan Babbler
- Afghan Snowfinch
- African Banks
- African Black Duck
- African Black Swift
- African Blue Flycatcher
- African Broadbill
- African Collared Dove
- African crake
- African Crimson-winged Finch
- African cuckoo
- African Cuckoo-Hawk
- African Darter
- African Desert Warbler
- African Dusky Flycatcher
- African Dwarf Kingfisher
- African emerald cuckoo
- African Finfoot
- African firefinch
- African Fish Eagle
- African Golden Oriole
- African Grass Owl
- African Green Pigeon
- African Grey Hornbill
- African Grey Parrot
- African ground thrush
- African Harrier-Hawk
- African hawk-eagle
- African hill babbler
- African Hobby
- African Jacana
- African Marsh Harrier
- African olive pigeon
- African Openbill
- African Oystercatcher
- African Palm Swift
- African Paradise Flycatcher
- African Penguin
- African Pied Hornbill
- African Pied Wagtail
- African Pipit
- African Pitta
- African Pygmy Goose
- African Pygmy Kingfisher
- African Quailfinch
- African Rail
- African Reed Warbler
- African Rock Pipit
- African Sacred Ibis
- African scops owl
- African Shrike-flycatcher
- African silverbill
- African Skimmer
- African Spoonbill
- African Spotted Creeper
- African Stonechat
- African thrush
- African Wattled Lapwing
- African Wood Owl
- African Yellow Warbler
- African Yellow White-eye
- Agami Heron
- Agulhas Long-billed Lark
- Ailsa Craig
- Aiolornis
- Aïr and Ténéré National Nature Reserve
- Ajai Wildlife Reserve
- ʻAkepa
- ʻAkiapolaʻau
- ʻAkikiki
- Akimiski Island Migratory Bird Sanctuary
- ʻAkohekohe
- Akpatok Island
- Akraberg
- Aktash Massif Important Bird Area
- Akun eagle-owl
- Akyatan Lagoon
- Al Shouf Cedar Nature Reserve
- Alagoas Antwren
- Alagoas Curassow
- Alagoas Tyrannulet
- Alan Dean (ornithologist)
- Alan Feduccia
- Alan Harding Lendon
- Alan Leishman
- Alaotra Grebe
- Alaska Raptor Center
- Albany River Estuary
- Albatross Island (Tasmania)
- Albert's Lyrebird
- Alberto O. Treganza
- Aldabra
- Aldabra brush warbler
- Aldabra drongo
- Alepu
- Aleutian Cackling Goose
- Alexander Hugh Chisholm
- Alexander Island (Houtman Abrolhos)
- Alexander Skutch
- Alexander Wetmore
- Alexander William Milligan
- Alexander Wilson
- Alexandrine Parakeet
- Alexornis
- Alfred Hart Everett
- Alfred John North
- Alfred Marshall Bailey
- Alfred Newton
- Alfred Newton Lecture
- Algerian Nuthatch
- Alkhornet
- Allan Brooks
- Allan Octavian Hume
- Allan Reginald McEvey
- Allan Roy Sefton
- Allegan State Game Area
- Allen's Gallinule
- Allen's Hummingbird
- Allen Morgan
- Aller and Beer Woods
- Aller Hill
- Aller, Somerset
- Alligator Rivers
- Allpahuayo Antbird
- Alpine Accentor
- Alpine chough
- Alpine Pipit
- Alpine Swift
- Altai Accentor
- Altai Falcon
- Altai Snowcock
- Altamira Oriole
- Altamira Yellowthroat
- Althea Sherman
- Amami thrush
- Amami woodcock
- Amarambalam
- ʻĀmaui
- Amazilia Hummingbird
- Amazon Kingfisher
- Amazonian Antshrike
- Amazonian Barred Woodcreeper
- Amazonian Pygmy Owl
- Amazonian Royal Flycatcher
- Amazonian Scrub Flycatcher
- Amazonian Violaceous Trogon
- Amber Mountain Rock Thrush
- Ambon White-eye
- Ameline Swiftlet
- American avocet
- American Bird Conservancy
- American Birding Association
- American bittern
- American black duck
- American Black Swift
- American Bushtit
- American cliff swallow
- American coot
- American crow
- American Darter
- American Dipper
- American Dusky Flycatcher
- American flamingo
- American Giant Runt
- American golden plover
- American goldfinch
- American Gray Flycatcher
- American herring gull
- American kestrel
- American Ornithologists' Union
- American oystercatcher
- American Pipit
- American purple gallinule
- American Pygmy Kingfisher
- American Redstart
- American robin
- American Show Racer
- American Three-toed Woodpecker
- American Tree Sparrow
- American white ibis
- American white pelican
- American wigeon
- American woodcock
- American Yellow Warbler
- Amethyst Brown Dove
- Amethyst Woodstar
- Amherst Island
- Amitabha (bird)
- Amrok River estuary Important Bird Area
- Amur Falcon
- Anambra Waxbill
- Anbyon Field
- Ancash Tapaculo
- Ancient murrelet
- Ancona duck
- Andalgalornis
- Andaman Bulbul
- Andaman coucal
- Andaman crake
- Andaman Cuckoo-Dove
- Andaman Cuckooshrike
- Andaman drongo
- Andaman Hawk-Owl
- Andaman Nightjar
- Andaman scops owl
- Andaman serpent eagle
- Andaman Teal
- Andaman Treepie
- Andaman wood pigeon
- Andaman Woodpecker
- Andean Cock-of-the-rock
- Andean condor
- Andean Crested Duck
- Andean Emerald
- Andean flamingo
- Andean Flicker
- Andean Goose
- Andean Guan
- Andean Hillstar
- Andean Parakeet
- Andean Pygmy Owl
- Andean slaty thrush
- Andean solitaire
- Andean Teal
- Anderson Inlet
- Anderson Island (Tasmania)
- Andrew Cockburn (ornithologist)
- Andrew Jackson Grayson
- Andrew John Berger
- Andrew Smith (zoologist)
- Andrewsornis
- Angolan Batis
- Angolan Cave Chat
- Angolan lark
- Angove Lake
- Angus Hargreaves Robinson
- Anhinga
- Anhinga walterbolesi
- ʻAnianiau
- Anjouan Sparrowhawk
- Ankober Serin
- Anna's Hummingbird
- Anna Plains Station
- Annie Meinertzhagen
- Annobón Paradise Flycatcher
- Annobón White-eye
- Anser Island
- Anshi National Park
- Anson Bay, Daly and Reynolds River Floodplains
- Ansorge's Greenbul
- Antarctic petrel
- Antarctic Prion
- Antarctic Tern
- Antbird
- Anteater Chat
- Antillean Cave Rail
- Antillean Crested Hummingbird
- Antillean Euphonia
- Antillean Mango
- Antillean Nighthawk
- Antillean Palm Swift
- Antillean Piculet
- Antillean Siskin
- Antioquia Bristle Tyrant
- Antioquia Wren
- Antipodean Albatross
- Antipodes Islands
- Antipodes Snipe
- Antpitta
- ʻApapane
- Aparima River
- Apatornis
- Apatosagittarius
- Apéndice Island
- Apical Flycatcher
- Aplomado falcon
- Apo Myna
- Apo Sunbird
- Apolinar's Wren
- Apostlebird
- Appert's Tetraka
- Apricot-breasted Sunbird
- Aptenodytes ridgeni
- Apteribis
- Apurímac Brush Finch
- Apurímac Spinetail
- Aquatic Warbler
- Aquila (genus)
- Aquila bullockensis
- Arabian Accentor
- Arabian Bustard
- Arabian Partridge
- Arabian Waxbill
- Arabian Wheatear
- Arafura Fantail
- Arafura Swamp
- Aralam Wildlife Sanctuary
- Araluen-Wungong Important Bird Area
- Aramus paludigrus
- Aran Islands
- Araripe Manakin
- Araucaria Tit-Spinetail
- Archaeopsittacus
- Archaeopteryx
- Archaeospheniscus lopdelli
- Archaeospheniscus lowei
- Archbold's Bowerbird
- Archbold's Newtonia
- Archbold's Owlet-nightjar
- Archer's Buzzard
- Archer's Lark
- Archibald George Campbell
- Archibald James Campbell
- Archibald Thorburn
- Arctic Goose Joint Venture
- Arctic Redpoll
- Arctic tern
- Arctic warbler
- Ardley Island
- Areia Branca beach and hinterland
- Arfak Astrapia
- Arfak Honeyeater
- Argentavis
- Argus Bare-eye
- Aride Island
- Aripuana Antwren
- Arizona Woodpecker
- Arkaroola
- Arlie William Schorger
- Armenian Gull
- Armstrong Reef
- Arne RSPB reserve
- Arnhem Plateau
- Arnold Boyd
- Arnold Robert McGill
- Arrowhead Warbler
- Arthur Augustus Allen
- Arthur Cleveland Bent
- Arthur Cox (ornithologist)
- Arthur Harbour
- Arthur Hay, 9th Marquess of Tweeddale
- Arthur Holmes Howell
- Arthur Humble Evans
- Arthur Landsborough Thomson
- Arthur Mattingley
- Arthur Stark
- Asan Barrage
- Ascension Island
- Aschau (Lachte)
- Ash's Lark
- Ash-throated Antwren
- Ash-throated Casiornis
- Ashana Game Reserve
- Ashburton River / Hakatere
- Ashdown Forest
- Ashmore and Cartier Islands
- Ashton Lever
- Ashy-bellied White-eye
- Ashy-breasted Flycatcher
- Ashy-crowned Sparrow-Lark
- Ashy-faced Owl
- Ashy-headed Babbler
- Ashy-headed Laughingthrush
- Ashy-tailed Swift
- Ashy-throated Bush Tanager
- Ashy-throated Parrotbill
- Ashy-throated Warbler
- Ashy Bulbul
- Ashy drongo
- Ashy flowerpecker
- Ashy Flycatcher
- Ashy Minivet
- Ashy Prinia
- Ashy storm petrel
- Ashy thrush
- Ashy wood pigeon
- Ashy Woodpecker
- Ashy Woodswallow
- Asian–East African Flyway
- Asian Barred Owlet
- Asian Brown Flycatcher
- Asian Desert Warbler
- Asian dowitcher
- Asian emerald cuckoo
- Asian Fairy-bluebird
- Asian Glossy Starling
- Asian house martin
- Asian koel
- Asian Openbill
- Asian Palm Swift
- Asian Paradise Flycatcher
- Asian Short-toed Lark
- Asian Stubtail
- Asity
- Askot Musk Deer Sanctuary
- Aspland Island
- Assam Laughingthrush
- Astrapian Sicklebill
- Astrebla Downs National Park
- Atapaka Bird Sanctuary
- Atauro Island
- Athelney
- Atherton Scrubwren
- Atherton Tableland
- Atitlán grebe
- Atiu Swiftlet
- Atlantic Canary
- Atlantic Petrel
- Atlantic puffin
- Atlantic Royal Flycatcher
- Atlas of Australian Birds
- Atoll Fruit Dove
- Atriceps Island
- Attenborough Nature Reserve
- Attiveri Bird Sanctuary
- Attwater's Prairie Chicken
- Au Sable State Forest
- Auckland Island
- Auckland Islands
- Auckland Islands Shore Plover
- Auckland merganser
- Auckland Rail
- Auckland Snipe
- Auckland Teal
- Audouin's Gull
- Audubon's Oriole
- Audubon's shearwater
- Audubon Society of Western Pennsylvania
- Aughris
- Augur buzzard
- Austen's Brown Hornbill
- Austral Canastero
- Austral Parakeet
- Austral Pygmy Owl
- Austral snipe
- Austral thrush
- Australasian bittern
- Australasian Figbird
- Australasian Gannet
- Australasian Grebe
- Australasian Ornithological Conference
- Australasian pipit
- Australasian Raptor Association
- Australasian Seabird Group
- Australasian Shoveler
- Australasian treecreeper
- Australasian Wader Studies Group
- Australian Alps
- Australian Bird and Bat Banding Scheme
- Australian Bird Count
- Australian Bird Study Association
- Australian brushturkey
- Australian Bustard
- Australian Crake
- Australian Golden Whistler
- Australian Hobby
- Australian King Parrot
- Australian logrunner
- Australian magpie
- Australian Masked Owl
- Australian mudnester
- Australian Owlet-nightjar
- Australian Painted-snipe
- Australian pelican
- Australian Pied Cormorant
- Australian Pratincole
- Australian raven
- Australian Reed Warbler
- Australian ringneck
- Australian Shelduck
- Australian Swiftlet
- Australian white ibis
- Australian Wood Duck
- Australlus
- Australo-Papuan babbler
- Australornis
- Australotadorna
- Avian Island
- Avisaurus
- Avolatavis
- Awrey Island
- Aylesbeare Common
- Aylesbury duck
- Ayres's hawk-eagle
- Azores Bullfinch
- Azores Wood Pigeon
- Aztec thrush
- Azuero Dove
- Azure-breasted Pitta
- Azure-crested Flycatcher
- Azure-hooded jay
- Azure Dollarbird
- Azure Jay
- Azure kingfisher
- Azure Tit
- Babel Island
- Bac Beag
- Bac Mòr
- Bachman's Sparrow
- Bachman's Warbler
- Badger Island
- Baer's Pochard
- Baglafecht Weaver
- Bagobo Babbler
- Bahama Mockingbird
- Bahama Oriole
- Bahama Swallow
- Bahama Warbler
- Bahama Woodstar
- Bahama Yellowthroat
- Bahaman Caracara
- Bahia Antwren
- Bahía Lomas
- Bahia Spinetail
- Bahia Tapaculo
- Bahia Tyrannulet
- Baie de Bouéni
- Baie de l'Isle-Verte
- Baie Larose
- Baikal Bullfinch
- Baikal Bush Warbler
- Baikal teal
- Baillarge Bay
- Baillon's Crake
- Baily Head
- Baird's sandpiper
- Baird's Sparrow
- Baird Island
- Baird Ornithological Club
- Bakhira Sanctuary
- Bal-chatri
- Bald eagle
- Bald Island
- Bald Parrot
- Balearic Shearwater
- Bali Myna
- Balicassiao
- Balpakram
- Balsas Screech Owl
- Baltimore Oriole
- Bamboo Warbler
- Bamenda Apalis
- Bananal Antbird
- Bananaquit
- Band-backed Wren
- Band-bellied Crake
- Band-rumped storm petrel
- Band-rumped Swift
- Band-tailed Antshrike
- Band-tailed Antwren
- Band-tailed Barbthroat
- Band-tailed Hornero
- Band-tailed Pigeon
- Banda Myzomela
- Banded bay cuckoo
- Banded Cotinga
- Banded Fruit Dove
- Banded Green Sunbird
- Banded ground cuckoo
- Banded Honeyeater
- Banded Kestrel
- Banded Lapwing
- Banded Martin
- Banded Quail
- Banded Stilt
- Banded Wattle-eye
- Banded Whiteface
- Banded Woodpecker
- Banded Wren
- Bandhavgarh National Park
- Bandipur National Park
- Banggai crow
- Bangwa Forest Warbler
- Bank Cormorant
- Bank Myna
- Bank Swallow
- Bankapura
- Bankapura Peacock Sanctuary
- Bannerghatta National Park
- Bannerman's turaco
- Bannerman's Weaver
- Banni Grasslands Reserve
- Bantam (poultry)
- Baptornis
- Bar-backed Partridge
- Bar-bellied Cuckooshrike
- Bar-bellied Woodcreeper
- Bar-breasted firefinch
- Bar-breasted Honeyeater
- Bar-headed Goose
- Bar-necked Cuckoo-Dove
- Bar-shouldered Dove
- Bar-tailed godwit
- Bar-tailed Lark
- Bar-tailed Treecreeper
- Bar-tailed trogon
- Bar-throated Apalis
- Bar-throated minla
- Bar-winged Flycatcher-shrike
- Bar-winged Oriole
- Bar-winged Prinia
- Bar-winged Rail
- Bar-winged weaver
- Bar-winged Wood Wren
- Barau's Petrel
- Barawertornis
- Barbados Bullfinch
- Barbados Rail
- Barbara De Wolfe
- Barbara Kathleen Snow
- Barbary Falcon
- Barbary Partridge
- Barbuda Warbler
- Bare-cheeked Trogon
- Bare-eyed Antbird
- Bare-eyed Myna
- Bare-eyed thrush
- Bare-eyed white-eye
- Bare-faced Curassow
- Bare-headed Laughingthrush
- Bare-legged owl
- Bare-necked Fruitcrow
- Bare-throated tiger heron
- Bare-throated Whistler
- Bargerveen Nature Reserve
- Barka Indigobird
- Barker Inlet
- Barking Imperial Pigeon
- Barking owl
- Barmah-Millewa Important Bird Area
- Barn owl
- Barn swallow
- Barnacle goose
- Barnard Point
- Barolo shearwater
- Baron's Spinetail
- Barra Head
- Barratt's Warbler
- Barred Antshrike
- Barred Buttonquail
- Barred Cuckoo-Dove
- Barred Dove
- Barred eagle-owl
- Barred Forest Falcon
- Barred Honeyeater
- Barred Laughingthrush
- Barred owl
- Barred Puffbird
- Barred Warbler
- Barren Grounds Bird Observatory
- Barren Grounds Nature Reserve
- Barrington Tops National Park
- Barron Gorge National Park
- Barrow's goldeneye
- Barrow Island (Western Australia)
- Barton Point Nature Reserve
- Basra Reed Warbler
- Bassian thrush
- Bat falcon
- Bat Hawk
- Bateleur
- Bates's Nightjar
- Bates's Paradise Flycatcher
- Bates's Sunbird
- Bates's Swift
- Bates's Weaver
- Bates Island
- Bathoceleus hyphalus
- Batis (bird)
- Batoggisem, Dansem and Zamori Islands Important Bird Area
- Baudin's Black Cockatoo
- Baudo Guan
- Baudó Oropendola
- Bavaripsitta
- Bawdrip
- Bay-backed Shrike
- Bay-breasted cuckoo
- Bay-breasted Warbler
- Bay-chested Warbling Finch
- Bay-vented Cotinga
- Bay Antpitta
- Bay coucal
- Bay Hornero
- Bay Thrush
- Bay Woodpecker
- Baya Weaver
- Baywing
- Beach Stone-curlew
- Beagle Island
- Bean goose
- Bear Creek Pioneers Park Wildlife Habitat/Aviary
- Bear Island (Norway)
- Beara Peninsula
- Bearded Barbet
- Bearded Bellbird
- Bearded Guan
- Bearded Helmetcrest
- Bearded Mountaineer
- Bearded Reedling
- Bearded vulture
- Beauchene Island
- Beaudouin's snake eagle
- Beautiful Firetail
- Beautiful Fruit Dove
- Beautiful Nuthatch
- Beautiful Sibia
- Beautiful Sunbird
- Beautiful Treerunner
- Beautiful Woodpecker
- Beaver Island, Falkland Islands
- Beck's Petrel
- Bedford's Paradise Flycatcher
- Bedout Island
- Bee-eaters in Britain
- Bee Hummingbird
- Beesley Island
- Beinn Dearg (Ullapool)
- Bekisar
- Belcher's gull
- Belding's Yellowthroat
- Belfast Lough
- Belford's Melidectes
- Bell's Sparrow
- Bell's Vireo
- Bell Miner
- Bellarine Wetlands Important Bird Area
- Bellenden Ker Range
- Belted kingfisher
- Belum-Temengor
- Bempton Cliffs
- Ben Boyd National Park
- Ben Lomond National Park
- Ben Wyvis
- Benara
- Bendigo Box-Ironbark Region
- Bendire's Thrasher
- Bengal Bush Lark
- Bengal Florican
- Bengangai Game Reserve
- Benger Swamp
- Benguela Long-billed Lark
- Benicia State Recreation Area
- Benjamin F. Goss
- Benjamin Leadbeater
- Bennu heron
- Bensbach's Bird of Paradise
- Benson's Rock Thrush
- Bentley Beetham
- Berlepsch's Canastero
- Berlinguet Inlet
- Bermuda Flicker
- Bermuda flightless duck
- Bermuda Night Heron
- Bermuda petrel
- Bernard Tucker
- Bernard Tucker Medal
- Bernd Heinrich
- Berney Marshes RSPB reserve
- Bernier's Vanga
- Berrow, Somerset
- Bertha's Beach Important Bird Area
- Berthelot's Pipit
- Bertram Smythies
- Berwyn range
- Berylline Hummingbird
- Besra
- Betsey Island
- Bewick's wren
- Bhindawas Wildlife Sanctuary
- Biak Black Flycatcher
- Biak coucal
- Biak Gerygone
- Biak Monarch
- Biak Paradise Kingfisher
- Biak scops owl
- Biak Scrubfowl
- Biak White-eye
- Biamanga National Park
- Bicknell's thrush
- Bicol Ground Warbler
- Bicoloured flowerpecker
- Biddulph's Ground Jay
- Big Black Reef
- Big Caroline Rock
- Big Desert Wilderness Park
- Big Green Island
- Big Lake (Alberta)
- Big Otter Creek
- Bill Lane
- Bill Lishman
- Bill Oddie
- Billiatt Conservation Park
- Bimaculated Lark
- Bimbisula
- Bindoon-Julimar Important Bird Area
- Birchs Inlet
- Bird City (wildfowl refuge)
- Bird Island (Tasmania)
- Bird Island, Falkland Islands
- Bird Island, Seychelles
- Bird Kingdom
- Bird Observation & Conservation Australia
- Bird Watching (magazine)
- Birding with Bill Oddie
- BirdLife Australia
- Birds Australia – Victoria
- Birds Australia Northern NSW
- Birds Australia Western Australia
- Birds Britannia
- Birds Britannica
- Birds of Ashmore Reef
- Birds of Australia
- Birds of Boigu, Saibai and Dauan Islands (Torres Strait)
- Birds of Cornwall
- Birds of Macquarie Island
- Birds of New Zealand
- Birds of North American boreal forests
- Birds of the Amazon
- Birds of the Central Indian Highlands
- Birds of the Indiana Dunes
- Birdwatch (magazine)
- Birdwatchers' Field Club of Bangalore
- Birmingham Roller
- Bishop's ʻŌʻō
- Bismarck Black Myzomela
- Bismarck Hanging Parrot
- Bismarck Kingfisher
- Bismarck Whistler
- Bismarck White-eye
- Black-and-chestnut Eagle
- Black-and-cinnamon Fantail
- Black-and-gold Cotinga
- Black-and-gold Tanager
- Black-and-orange Flycatcher
- Black-and-tawny Seedeater
- Black-and-white-casqued Hornbill
- Black-and-white Hawk-Eagle
- Black-and-white mannikin
- Black-and-white Monjita
- Black-and-white Shrike-flycatcher
- Black-and-white Tanager
- Black-and-white Tody-Flycatcher
- Black-and-white Triller
- Black-and-white Warbler
- Black-and-yellow Grosbeak
- Black-backed bittern
- Black-backed Butcherbird
- Black-backed Forktail
- Black-backed Oriole
- Black-backed Tanager
- Black-backed Thornbill
- Black-backed thrush
- Black-backed Tody-Flycatcher
- Black-backed Water Tyrant
- Black-backed Woodpecker
- Black-banded Barbet
- Black-banded Flycatcher
- Black-banded Woodcreeper
- Black-bellied Bustard
- Black-bellied Cuckooshrike
- Black-bellied firefinch
- Black-bellied Gnateater
- Black-bellied Myzomela
- Black-bellied sandgrouse
- Black-bellied seedcracker
- Black-bellied Seedeater
- Black-bellied storm petrel
- Black-bellied Tern
- Black-belted flowerpecker
- Black-bibbed Cicadabird
- Black-bibbed Monarch
- Black-bibbed Tit
- Black-billed Amazon
- Black-billed Barbet
- Black-billed cuckoo
- Black-billed Gull
- Black-billed koel
- Black-billed Magpie
- Black-billed nightingale-thrush
- Black-billed Sicklebill
- Black-billed Streamertail
- Black-billed thrush
- Black-billed turaco
- Black-billed Weaver
- Black-billed Wood Dove
- Black-breasted Buttonquail
- Black-breasted Buzzard
- Black-breasted Hillstar
- Black-breasted mannikin
- Black-breasted Myzomela
- Black-breasted Parrotbill
- Black-breasted Puffleg
- Black-breasted thrush
- Black-breasted Weaver
- Black-browed albatross
- Black-browed Babbler
- Black-browed Bushtit
- Black-browed Fulvetta
- Black-browed Reed Warbler
- Black-capped Apalis
- Black-capped Babbler
- Black-capped Bulbul
- Black-capped Chickadee
- Black-capped donacobius
- Black-capped Gnatcatcher
- Black-capped Kingfisher
- Black-capped Lory
- Black-capped Parakeet
- Black-capped Piprites
- Black-capped Siskin
- Black-capped Social Weaver
- Black-capped Speirops
- Black-capped Vireo
- Black-capped Woodland Warbler
- Black-casqued Hornbill
- Black-cheeked Ant Tanager
- Black-cheeked Gnateater
- Black-cheeked Lovebird
- Black-cheeked Waxbill
- Black-chested Buzzard-Eagle
- Black-chested snake eagle
- Black-chested Sparrow
- Black-chinned babbler
- Black-chinned Fruit Dove
- Black-chinned Honeyeater
- Black-chinned Hummingbird
- Black-chinned Laughingthrush
- Black-chinned Monarch
- Black-chinned Quailfinch
- Black-chinned Siskin
- Black-chinned Sparrow
- Black-chinned Whistler
- Black-chinned yuhina
- Black-collared Apalis
- Black-collared Jay
- Black-collared Lovebird
- Black-collared Starling
- Black-cowled Oriole
- Black-cowled Saltator
- Black-crested Bulbul
- Black-crested Coquette
- Black-crested Tit
- Black-crested Titmouse
- Black-crowned babbler
- Black-crowned Monjita
- Black-crowned night heron
- Black-crowned Sparrow-Lark
- Black-crowned Tanager
- Black-crowned Tchagra
- Black-crowned Tityra
- Black-crowned Waxbill
- Black-crowned white-eye
- Black-dotted Piculet
- Black-eared cuckoo
- Black-eared ground thrush
- Black-eared Miner
- Black-eared Oriole
- Black-eared Shrike-babbler
- Black-eared Wheatear
- Black-faced Antthrush
- Black-faced Bunting
- Black-faced Cormorant
- Black-faced coucal
- Black-faced Cuckooshrike
- Black-faced firefinch
- Black-faced Friarbird
- Black-faced Grassquit
- Black-faced Hawk
- Black-faced Ibis
- Black-faced Laughingthrush
- Black-faced Monarch
- Black-faced munia
- Black-faced Quailfinch
- Black-faced Rufous Warbler
- Black-faced sandgrouse
- Black-faced Sheathbill
- Black-faced solitaire
- Black-faced Spoonbill
- Black-faced Warbler
- Black-faced Waxbill
- Black-faced Woodswallow
- Black-fronted Bushshrike
- Black-fronted Dotterel
- Black-fronted flowerpecker
- Black-fronted Nunbird
- Black-fronted Parakeet
- Black-fronted Piping Guan
- Black-fronted Tern
- Black-fronted white-eye
- Black-fronted Wood Quail
- Black-goggled Tanager
- Black-headed Antthrush
- Black-headed Batis
- Black-headed Berryeater
- Black-headed Brush Finch
- Black-headed Bulbul
- Black-headed Bunting
- Black-headed Canary
- Black-headed Cuckooshrike
- Black-headed Gonolek
- Black-headed grosbeak
- Black-headed gull
- Black-headed heron
- Black-headed Honeyeater
- Black-headed Ibis
- Black-headed Jay
- Black-headed Lapwing
- Black-headed Myzomela
- Black-headed nightingale-thrush
- Black-headed Oriole
- Black-headed Parrot
- Black-headed Parrotbill
- Black-headed Pitta
- Black-headed Saltator
- Black-headed Shrike-babbler
- Black-headed Tailorbird
- Black-headed Waxbill
- Black-headed Weaver
- Black-hooded Antwren
- Black-hooded coucal
- Black-hooded Oriole
- Black-hooded Sunbeam
- Black-hooded thrush
- Black-legged Dacnis
- Black-legged kittiwake
- Black-legged Seriema
- Black-lored Parrot
- Black-lored Waxbill
- Black-mandibled Toucan
- Black-naped Fruit Dove
- Black-naped Monarch
- Black-naped Oriole
- Black-naped Tern
- Black-necked Aracari
- Black-necked crane
- Black-necked cranes in Bhutan
- Black-necked grebe
- Black-necked Red Cotinga
- Black-necked stilt
- Black-necked Stork
- Black-necked Wattle-eye
- Black-necked Weaver
- Black-necked Woodpecker
- Black-necklaced Honeyeater
- Black-nest Swiftlet
- Black-polled Yellowthroat
- Black-ringed White-eye
- Black-rumped Buttonquail
- Black-rumped Flameback
- Black-rumped waxbill
- Black-shouldered Kite
- Black-shouldered Nightjar
- Black-sided flowerpecker
- Black-spectacled Brush Finch
- Black-spotted Barbet
- Black-striped Sparrow
- Black-tailed Antbird
- Black-tailed Crake
- Black-tailed Gnatcatcher
- Black-tailed godwit
- Black-tailed gull
- Black-tailed Monarch
- Black-tailed Nativehen
- Black-tailed Tityra
- Black-tailed treecreeper
- Black-tailed Trogon
- Black-thighed Falconet
- Black-thighed Puffleg
- Black-throated Accentor
- Black-throated Apalis
- Black-throated blue warbler
- Black-throated Bushtit
- Black-throated coucal
- Black-throated Euphonia
- Black-throated Finch
- Black-throated Gray Warbler
- Black-throated Green Warbler
- Black-throated honeyeater
- Black-throated loon
- Black-throated Magpie-Jay
- Black-throated Mango
- Black-throated munia
- Black-throated Parrotbill
- Black-throated Prinia
- Black-throated robin
- Black-throated Shrikebill
- Black-throated Spinetail
- Black-throated Sunbird
- Black-throated Thistletail
- Black-throated thrush
- Black-throated Trogon
- Black-throated Wattle-eye
- Black-throated Wren-Babbler
- Black-tipped Monarch
- Black-vented Oriole
- Black-vented shearwater
- Black-whiskered Vireo
- Black-winged Cuckooshrike
- Black-winged Kite
- Black-winged Lapwing
- Black-winged Lory
- Black-winged Lovebird
- Black-winged Oriole
- Black-winged Pratincole
- Black-winged Red Bishop
- Black-winged Saltator
- Black-winged Starling
- Black-winged stilt
- Black Baza
- Black Bee-eater
- Black Bishop
- Black bittern
- Black Bulbul
- Black Caracara
- Black coucal
- Black Crake
- Black crowned crane
- Black cuckoo
- Black Curassow
- Black currawong
- Black Dove
- Black drongo
- Black Duck Joint Venture
- Black Dwarf Hornbill
- Black Eagle
- Black Falcon
- Black francolin
- Black Grasswren
- Black Grouse
- Black Guan
- Black Guillemot
- Black Guineafowl
- Black Harrier
- Black Hawk-Eagle
- Black heron
- Black Honey Buzzard
- Black honeyeater
- Black Imperial Pigeon
- Black Inca
- Black Jacobin
- Black kite
- Black Lark
- Black Lory
- Black Mamo
- Black mannikin
- Black Metaltail
- Black noddy
- Black Nunbird
- Black Oriole
- Black oystercatcher
- Black Partridge
- Black Phoebe
- Black Pyramid Rock
- Black rail
- Black Redstart
- Black robin
- Black Rosy Finch
- Black Saw-wing
- Black Scimitarbill
- Black scoter
- Black Scrub Robin
- Black Shama
- Black Sicklebill
- Black skimmer
- Black solitaire
- Black Sparrowhawk
- Black Spinetail
- Black stilt
- Black Stork
- Black storm petrel
- Black tern
- Black thrush
- Black turnstone
- Black vulture
- Black wheatear
- Black Woodpecker
- Blackburnian Warbler
- Blackcap Babbler
- Blackcap illadopsis
- Blackish-grey Antshrike
- Blackish Antbird
- Blackish Cinclodes
- Blackish Cuckooshrike
- Blackish Pewee
- Blackish Tapaculo
- Blackpoll Warbler
- Blacksmith Lapwing
- Blackstart
- Blackthroat
- Blacktoft Sands RSPB reserve
- Blackwater Estuary
- Blakeney Point
- Blanford's Lark
- Blanford's Rosefinch
- Blanford's Snowfinch
- Blasket Islands
- Blaze-winged Parakeet
- Bleadon
- Bleaker Island
- Bloedel Floral Conservatory
- Blomstrandhamna Bird Sanctuary
- Blond-crested Woodpecker
- Blood's Bird of Paradise
- Blood-breasted flowerpecker
- Blood-coloured Woodpecker
- Blood-eared Parakeet
- Blood Pheasant
- Blossom-headed Parakeet
- Blossomcrown
- Blue-and-white Flycatcher
- Blue-and-white Kingfisher
- Blue-and-white Mockingbird
- Blue-and-white Swallow
- Blue-and-yellow Macaw
- Blue-and-yellow Tanager
- Blue-backed Manakin
- Blue-backed Parrot
- Blue-banded Kingfisher
- Blue-banded Pitta
- Blue-bearded Bee-eater
- Blue-bellied Parrot
- Blue-bellied Roller
- Blue-billed Curassow
- Blue-billed Duck
- Blue-billed Malimbe
- Blue-black grassquit
- Blue-breasted Bee-eater
- Blue-breasted Blue Flycatcher
- Blue-breasted Fairywren
- Blue-breasted Kingfisher
- Blue-capped cordon-bleu
- Blue-capped Fruit Dove
- Blue-capped Ifrit
- Blue-capped Redstart
- Blue-capped Rock Thrush
- Blue-cheeked Amazon
- Blue-cheeked Bee-eater
- Blue-cheeked flowerpecker
- Blue-chinned Sapphire
- Blue-collared Parrot
- Blue-crowned Hanging Parrot
- Blue-crowned Laughingthrush
- Blue-crowned Lorikeet
- Blue-crowned Motmot
- Blue-crowned Parakeet
- Blue-crowned Racket-tail
- Blue-crowned Trogon
- Blue-eared Barbet
- Blue-eared Kingfisher
- Blue-eared Lory
- Blue-eyed Cockatoo
- Blue-eyed ground dove
- Blue-faced honeyeater
- Blue-faced malkoha
- Blue-faced Parrotfinch
- Blue-faced Rail
- Blue-footed booby
- Blue-fronted Amazon
- Blue-fronted Blue Flycatcher
- Blue-fronted Lorikeet
- Blue-fronted Redstart
- Blue-fronted Robin
- Blue-gray Gnatcatcher
- Blue-gray Tanager
- Blue-headed Bee-eater
- Blue-headed coucal
- Blue-headed Crested Flycatcher
- Blue-headed Macaw
- Blue-headed Parrot
- Blue-headed Pitta
- Blue-headed Quail-Dove
- Blue-headed Racket-tail
- Blue-headed Vireo
- Blue-headed Wood Dove
- Blue-mantled Crested Flycatcher
- Blue-masked leafbird
- Blue-moustached Bee-eater
- Blue-naped Chlorophonia
- Blue-naped Mousebird
- Blue-naped Parrot
- Blue-naped Pitta
- Blue-rumped Parrot
- Blue-shouldered Robin-Chat
- Blue-spotted Wood Dove
- Blue-tailed Bee-eater
- Blue-tailed Emerald
- Blue-tailed Hummingbird
- Blue-throated Barbet
- Blue-throated Blue Flycatcher
- Blue-throated Brown Sunbird
- Blue-throated Macaw
- Blue-throated Mountaingem
- Blue-throated Roller
- Blue-throated Toucanet
- Blue-tufted Starthroat
- Blue-winged Goose
- Blue-winged Kookaburra
- Blue-winged Laughingthrush
- Blue-winged Leafbird
- Blue-winged Macaw
- Blue-winged minla
- Blue-winged Parakeet
- Blue-winged Parrot
- Blue-winged Parrotlet
- Blue-winged Pitta
- Blue-winged Racket-tail
- Blue-winged teal
- Blue-winged Warbler
- Blue Bird-of-paradise
- Blue bunting
- Blue Chaffinch
- Blue coua
- Blue crane
- Blue Dacnis
- Blue duck
- Blue Eared Pheasant
- Blue Finch
- Blue grosbeak
- Blue jay
- Blue Korhaan
- Blue Lorikeet
- Blue Manakin
- Blue Mockingbird
- Blue Mountain Vireo
- Blue Mud Bay
- Blue Nuthatch
- Blue Paradise Flycatcher
- Blue Petrel
- Blue Quail
- Blue Rock Thrush
- Blue Swallow
- Blue Vanga
- Blue waxbill
- Blue whistling thrush
- Bluebonnet (bird)
- Bluethroat
- Bluish Flowerpiercer
- Blunt-winged Warbler
- Bluntschli's Vanga
- Blyth's Hawk-Eagle
- Blyth's Hornbill
- Blyth's Kingfisher
- Blyth's Leaf Warbler
- Blyth's Pipit
- Blyth's Reed Warbler
- Blyth's Shrike-babbler
- Blyth's Swift
- Blyth's Tragopan
- Boa Entrada
- Boas River
- Boat-billed Flycatcher
- Boat-billed heron
- Boat-billed Tody-Tyrant
- Boat-tailed Grackle
- Boatswain Bay
- Boatswain Bay Migratory Bird Sanctuary
- Boatswain Bird Island
- Bob-tailed Weaver
- Bob Green (naturalist)
- Bob Scott (ornithologist)
- Bobolink
- Bocage's Bushshrike
- Bodmin Moor
- Bogotá Rail
- Boheman Bird Sanctuary
- Bohemian waxwing
- Bohol Sunbird
- Bokikokiko
- Bokmakierie
- Bolivian Blackbird
- Bolivian Brush Finch
- Bolivian Earthcreeper
- Bolivian Recurvebill
- Bolivian Slaty Antshrike
- Bolivian Spinetail
- Bolivian Warbling Finch
- Bolle's pigeon
- Bollons Island
- Bonal Bird Sanctuary
- Bonaparte's Parakeet
- Bonelli's Eagle
- Bonin grosbeak
- Bonin nankeen night heron
- Bonin petrel
- Bonin thrush
- Bonin white-eye
- Bonin wood pigeon
- Booby Island (Kimberley)
- Booby Pond Nature Reserve
- Boodjamulla National Park
- Boolcoomatta Reserve
- Boolcoomatta, Bindarrah and Kalkaroo Stations Important Bird Area
- Boondall Wetlands
- Boondelbah Island
- Booted Eagle
- Booted Racket-tail
- Booted Warbler
- Booterstown marsh
- Border Ranges National Park
- Borðoy
- Boreal Chickadee
- Boreal owl
- Bornean Banded Pitta
- Bornean Barbet
- Bornean Black Magpie
- Bornean Blue Flycatcher
- Bornean Bristlehead
- Bornean Bulbul
- Bornean Forktail
- Bornean Frogmouth
- Bornean ground cuckoo
- Bornean leafbird
- Bornean Peacock-Pheasant
- Bornean Stubtail
- Bornean Swiftlet
- Bornean Treepie
- Bornean Whistler
- Bornean Whistling Thrush
- Bornean Wren-Babbler
- Borneo Thrush
- Botanic Park and Salina Reserve Important Bird Area
- Botha's Lark
- Botteri's Sparrow
- Boucard's Wren
- Boudeuse Island
- Bougainville Honeyeater
- Boundary Bay
- Bountiful Islands
- Bounty Islands
- Bounty Shag
- Bourke's Parrot
- Bournda National Park
- Bourne's heron
- Bouvet Island
- Bower's shrikethrush
- Boxen Island
- Boyd's Shearwater
- Boyd Alexander
- Boyd Robert Horsbrugh
- Brace's Emerald
- Bradfield's Hornbill
- Bradford Torrey
- Brading Marshes RSPB reserve
- Bradley C. Livezey
- Brahminy Kite
- Brahminy Starling
- Brambling
- Bran-colored Flycatcher
- Brandt's Mountain Finch
- Brant goose
- Branta rhuax
- Brasília Tapaculo
- Brass's Friarbird
- Brassy-breasted Tanager
- Braun's Bushshrike
- Brazilian Ruby
- Brazilian Teal
- Breaker Island
- Breaksea Islands (Tasmania)
- Brean
- Brecon Buff Goose
- Brehm's Tiger Parrot
- Brent Knoll
- Brent Knoll (village)
- Brent Knoll Camp
- Brewer's sparrow
- Breydon Water
- Brian Houghton Hodgson
- Bridgwater
- Bridled honeyeater
- Bridled Quail-Dove
- Bridled Sparrow
- Bridled tern
- Bridled Titmouse
- Bridled white-eye
- Briggs Islet
- Bright-rumped Attila
- Brigida's Woodcreeper
- Brimstone Canary
- Brisbane Water
- Bristle-nosed Barbet
- Bristle-thighed curlew
- Bristled Grassbird
- British avifauna
- British Birds (magazine)
- British Birds Rarities Committee
- British Birdwatching Fair
- British finches
- British Ornithologists' Club
- British Ornithologists' Union
- British Ornithologists' Union Records Committee
- British Show Racer
- British Trust for Ornithology
- Broad-billed Hummingbird
- Broad-billed Moa
- Broad-billed Prion
- Broad-billed sandpiper
- Broad-billed Tody
- Broad-billed Warbler
- Broad-tailed Grassbird
- Broad-tailed Hummingbird
- Broad-tailed Paradise Whydah
- Broad-tipped Hermit
- Broad-winged hawk
- Broad Sound (Queensland)
- Brodeur Peninsula
- Brodribb River
- Brolga
- Brontornis
- Bronze-tailed Comet
- Bronze-tailed Peacock-Pheasant
- Bronze-tailed starling
- Bronze-winged Courser
- Bronze-winged Jacana
- Bronze-winged Parrot
- Bronze-winged Woodpecker
- Bronze mannikin
- Bronze Parotia
- Bronze Shag
- Bronzed cowbird
- Bronzed drongo
- Bronzy Hermit
- Bronzy Jacamar
- Brook Islands National Park
- Brooks's Leaf Warbler
- Broome Bird Observatory
- Brown-and-yellow Marshbird
- Brown-backed Chat-Tyrant
- Brown-backed Honeybird
- Brown-backed Mockingbird
- Brown-backed Needletail
- Brown-backed Parrotlet
- Brown-backed Scrub Robin
- Brown-backed solitaire
- Brown-backed Whistler
- Brown-banded Antpitta
- Brown-banded Puffbird
- Brown-banded Rail
- Brown-breasted Flycatcher
- Brown-capped Babbler
- Brown-capped Fantail
- Brown-capped Laughingthrush
- Brown-capped Rosy Finch
- Brown-capped Weaver
- Brown-capped Woodpecker
- Brown-cheeked Fulvetta
- Brown-cheeked Hornbill
- Brown-cheeked Laughingthrush
- Brown-chested alethe
- Brown-chested Barbet
- Brown-chested Lapwing
- Brown-crested Flycatcher
- Brown-crowned Tchagra
- Brown-eared Bulbul
- Brown-flanked Bush Warbler
- Brown-flanked Tanager
- Brown-fronted Woodpecker
- Brown-headed Apalis
- Brown-headed Barbet
- Brown-headed Cowbird
- Brown-headed crow
- Brown-headed Gull
- Brown-headed Honeyeater
- Brown-headed Nuthatch
- Brown-headed Paradise Kingfisher
- Brown-headed Parrot
- Brown-headed thrush
- Brown-hooded Kingfisher
- Brown-necked raven
- Brown-rumped Bunting
- Brown-streaked Flycatcher
- Brown-tailed Rock Chat
- Brown-throated Barbet
- Brown-throated fulvetta
- Brown-throated Martin
- Brown-throated Sunbird
- Brown-throated Wattle-eye
- Brown-throated Wren
- Brown-winged Kingfisher
- Brown-winged Parrotbill
- Brown-winged Schiffornis
- Brown-winged Whistling Thrush
- Brown Accentor
- Brown Babbler
- Brown Bluff
- Brown booby
- Brown Bullfinch
- Brown Bush Warbler
- Brown Crake
- Brown Creeper
- Brown Dipper
- Brown Eared Pheasant
- Brown Falcon
- Brown Firefinch
- Brown fish owl
- Brown Gerygone
- Brown Goshawk
- Brown Hawk-Owl
- Brown honeyeater
- Brown illadopsis
- Brown Inca
- Brown Jay
- Brown Lory
- Brown Nightjar
- Brown noddy
- Brown Nunlet
- Brown Parisoma
- Brown Parrotbill
- Brown pelican
- Brown Quail
- Brown Rock Chat
- Brown Shrike
- Brown Sicklebill
- Brown Skua
- Brown snake eagle
- Brown Songlark
- Brown Tanager
- Brown Teal
- Brown Thornbill
- Brown thrasher
- Brown Tit-Babbler
- Brown Treecreeper
- Brown Trembler
- Brown Twinspot
- Brown Violetear
- Brown Wood Owl
- Brownish-headed Antbird
- Brownish Elaenia
- Brownsea Island
- Brubru
- Bruce's Green Pigeon
- Bruce Beehler
- Bruce Campbell (ornithologist)
- Brue Valley Living Landscape
- Bruny Island
- Brush Bronzewing
- Brush cuckoo
- Bryan's shearwater
- Buchan Gulf
- Buchanan Point
- Buckenham Marshes RSPB reserve
- Buckingham Bay
- Buckley River Important Bird Area
- Budderoo National Park
- Budgerigar
- Budgerigar colour genetics
- Budgewoi Lake
- Buff-banded Rail
- Buff-barred Warbler
- Buff-bellied Hermit
- Buff-bellied Hummingbird
- Buff-bellied mannikin
- Buff-bellied Monarch
- Buff-bellied Pipit
- Buff-bellied Tanager
- Buff-bellied Warbler
- Buff-breasted Babbler
- Buff-breasted Buttonquail
- Buff-breasted Flycatcher
- Buff-breasted Mountain Tanager
- Buff-breasted sandpiper
- Buff-breasted Tody-Tyrant
- Buff-breasted Wren
- Buff-bridled Inca Finch
- Buff-browed Chachalaca
- Buff-cheeked Tody-Flycatcher
- Buff-chested babbler
- Buff-collared Nightjar
- Buff-faced Pygmy Parrot
- Buff-fronted Foliage-gleaner
- Buff-headed coucal
- Buff-necked Ibis
- Buff-rumped Thornbill
- Buff-sided robin
- Buff-spotted Flufftail
- Buff-spotted Woodpecker
- Buff-tailed Coronet
- Buff-tailed Sicklebill
- Buff-throated Apalis
- Buff-throated Purpletuft
- Buff-throated Saltator
- Buff-throated Sunbird
- Buff-throated Warbler
- Buff-throated Woodcreeper
- Buff Duck
- Buffy Laughingthrush
- Buffy Pipit
- Buffy Tuftedcheek
- Bugun Liocichla
- Bukit Timah Nature Reserve
- Bulgunnia Station
- Bull Point
- Buller's Albatross
- Buller's shearwater
- Bullockornis
- Bulloo River
- Bulunkul
- Bulunkul and Yashilkul lakes and mountains Important Bird Area
- Bulwer's petrel
- Bulwer's Pheasant
- Bumdeling Wildlife Sanctuary
- Bundarra-Barraba Important Bird Area
- Bunya Mountains National Park
- Burmese Bush Lark
- Burmese Shrike
- Burmese yuhina
- Burnham-on-Sea
- Burnished-buff Tanager
- Burrow Mump
- Burrowbridge
- Burrowing owl
- Burrowing Owl Conservation Network
- Burt Monroe
- Burton Mere Wetlands
- Buru Cuckooshrike
- Buru Golden Bulbul
- Buru Honeyeater
- Buru Mountain Pigeon
- Buru Racket-tail
- Buru thrush
- Buru White-eye
- Bush Blackcap
- Bush Moa
- Bush Petronia
- Bush Stone-curlew
- Bush turkey
- Bushveld Pipit
- Bushwren
- Bushy-crested Jay
- Buskett Gardens
- Bussex Rhine
- Butcherbird
- Buteogallus borrasi
- Butler's Corella
- Butterfly World
- Buttertubs Marsh
- Buzzing flowerpecker
- Bwindi Impenetrable National Park
- Byers Peninsula
- Bylot Island
- Bylot Island Migratory Bird Sanctuary
- C. Douglas Deane
- C. G. Finch-Davies
- Caatinga Antwren
- Caatinga Cacholote
- Caatinga Parakeet
- Cabanis's Bunting
- Cabanis's Greenbul
- Cabanis's Tanager
- Cabbage Tree Island
- Cabot's Tragopan
- Cabot Head
- Cachar wedge-billed babbler
- Cackling goose
- Cactus Canastero
- Cactus Wren
- Cadell and Blyth Floodplains
- Caerlaverock National Nature Reserve
- Cahow
- Cairn na Burgh Beag
- Cairn na Burgh Mòr
- Cairnburgh Castle
- Calandra Lark
- Calayan Rail
- California Clapper Rail
- California condor
- California Gnatcatcher
- California gull
- California Least Tern
- California quail
- California Thrasher
- California Towhee
- Californian Turkey
- Calingiri Important Bird Area
- Callaeidae
- Calliope Hummingbird
- Calyptophilus
- Camargue
- Cambodian Tailorbird
- Cambridge Point
- Cameroon Greenbul
- Cameroon Indigobird
- Cameroon Olive Greenbul
- Cameroon olive pigeon
- Cameroon Sunbird
- Camiguin Hanging Parrot
- Camiguin Hawk-Owl
- Campbell Albatross
- Campbell Island group
- Campbell Island, New Zealand
- Campbell Shag
- Campbell Snipe
- Campbell Teal
- Campina Jay
- Campo Flicker
- Canada goose
- Canada Warbler
- Canadaga
- Canadian Intermountain Joint Venture
- Canarian Houbara
- Canary Islands Chiffchaff
- Canary Islands Oystercatcher
- Canary Islands Quail
- Canary Islands Stonechat
- Canary White-eye
- Canberra Ornithologists Group
- Cannington, Somerset
- Canvasback
- Canyon Canastero
- Canyon Towhee
- Canyon Wren
- Cape Barren Goose
- Cape Batis
- Cape Bowles
- Cape Bulbul
- Cape Bunting
- Cape Canary
- Cape Clapper Lark
- Cape crow
- Cape Davidson
- Cape Evensen
- Cape Gannet
- Cape Garry
- Cape Geddes
- Cape Graham Moore
- Cape Grassbird
- Cape Hansen
- Cape Hay
- Cape Hooker (South Shetland Islands)
- Cape Kidnappers
- Cape Liddon
- Cape Longclaw
- Cape Lookout (South Shetland Islands)
- Cape May Bird Observatory
- Cape May Warbler
- Cape Melville (South Shetland Islands)
- Cape Parrot
- Cape Parry
- Cape Pembroke (Nunavut)
- Cape Penduline Tit
- Cape Petrel
- Cape Portland, Tasmania
- Cape Pygmy Owl
- Cape Robertson
- Cape Robin-Chat
- Cape rockjumper
- Cape Sable Seaside Sparrow
- Cape Searle
- Cape Shirreff
- Cape Shoveler
- Cape Siskin
- Cape sparrow
- Cape Spurfowl
- Cape Sugarbird
- Cape Teal
- Cape Vera
- Cape Verde shearwater
- Cape Verde Storm Petrel
- Cape Verde Swift
- Cape Verde Warbler
- Cape Vulture
- Cape Wagtail
- Cape Wallace
- Cape Weaver
- Cape White-eye
- Cape Whitson
- Cape Wollaston
- Cape Woolamai, Victoria
- Cape York to Cape Grenville Islands Important Bird Area
- Capertee Valley
- Capped heron
- Capped Wheatear
- Capricorn Silvereye
- Capricornia Cays National Park
- Capuchin Babbler
- Capuchinbird
- Caquetá Seedeater
- Caracas Brush Finch
- Caracas Tapaculo
- Carajás Woodcreeper
- Carbonated Sierra Finch
- Carcass Island
- Carden, Ontario
- Cardinal Myzomela
- Cardinal Woodpecker
- Carib Grackle
- Caribbean Coot
- Caribbean Dove
- Caribbean Elaenia
- Caribbean Martin
- Carl Alexander Gibson-Hill
- Carl R. Eklund
- Carlingford Lough
- Carmelite Sunbird
- Carnaby's Black Cockatoo
- Carnac Island
- Carolina Chickadee
- Carolina parakeet
- Carolina Wren
- Caroline Dormon
- Carp's Tit
- Carpentarian Grasswren
- Carrion crow
- Carrizal Seedeater
- Carruthers's Cisticola
- Carunculated Caracara
- Carunculated Fruit Dove
- Cascades Raptor Center
- Cascumpec Bay
- Caspian Gull
- Caspian Plover
- Caspian Snowcock
- Caspian tern
- Caspian Tit
- Cassin's auklet
- Cassin's finch
- Cassin's Flycatcher
- Cassin's hawk-eagle
- Cassin's Honeybird
- Cassin's Kingbird
- Cassin's Malimbe
- Cassin's Sparrow
- Cassin's Spinetail
- Cassin's Vireo
- Castle Espie
- Cat Island (Tasmania)
- Cataby Important Bird Area
- Catcott
- Catcott, Edington and Chilton Moors
- Cathayornis
- Cattle egret
- Cauca Guan
- Caucasian Great Rosefinch
- Caucasian Grouse
- Caucasian Snowcock
- Cauls Pond
- Cave swallow
- Cayenne Nightjar
- Cebu Flowerpecker
- Cebu Hanging Parrot
- Cebu hawk-owl
- Cecil Boden Kloss
- Cecil Hoskins Nature Reserve
- Cedar waxwing
- Celestial Monarch
- Cemlyn Bay and lagoon
- Central American Pygmy Owl
- Central Asian Flyway
- Central Catchment Nature Reserve
- Central Mangrove Wetland
- Central mountain range of Ilha de São Nicolau Important Bird Area
- Central NSW Mallee Important Bird Area
- Centre Hills
- Centre Island (Te Anau)
- Centropus colossus
- Ceramornis
- Cercomela
- Cereopsis novaehollandiae grisea
- Cerulean-capped Manakin
- Cerulean Cuckooshrike
- Cerulean Kingfisher
- Cerulean Paradise Flycatcher
- Cerulean Warbler
- Cetti's Warbler
- Ceylon Paradise-flycatcher
- Chabert Vanga
- Chaco Chachalaca
- Chad Firefinch
- Chalk-browed Mockingbird
- Chalky Island (Tasmania)
- Chalky, Big Green and Badger Island Groups Important Bird Area
- Chandler Robbins
- Changeable Hawk-Eagle
- Channel-billed Toucan
- Chantry Island (Ontario)
- Chapada Flycatcher
- Chapin's Babbler
- Chapin's Crombec
- Chaplin's barbet
- Charles-Eusèbe Dionne
- Charles B. Cory
- Charles Bendire
- Charles Chubb (ornithologist)
- Charles Darwin Reserve
- Charles Dixon (ornithologist)
- Charles Ernest William Bryant
- Charles Foster Batchelder
- Charles Frederic Belcher
- Charles George Nurse
- Charles Haskins Townsend
- Charles Henry Tilson Marshall
- Charles Johnson Maynard
- Charles Leslie Barrett
- Charles Oldham
- Charles Ottley Groom Napier
- Charles Rollin Keyes
- Charles Sibley
- Charles Swinhoe
- Charles Thorold Wood
- Charles Tunnicliffe
- Charles Vaurie
- Charles Wallace Richmond
- Charles Walter De Vis
- Chatham Albatross
- Chatham bellbird
- Chatham Coot
- Chatham Duck
- Chatham fernbird
- Chatham Gerygone
- Chatham kaka
- Chatham Oystercatcher
- Chatham Parakeet
- Chatham Penguin
- Chatham Petrel
- Chatham pigeon
- Chatham Rail
- Chatham raven
- Chatham Shag
- Chatham Snipe
- Chatham Tomtit
- Chattering Cisticola
- Chattering Kingfisher
- Chattering Lory
- Cheal Point
- Checker-throated Antwren
- Checker-throated Woodpecker
- Checkered Woodpecker
- Cheddar Yeo
- Chedzoy
- Cheer Pheasant
- Cheeseman Island
- Cheetham and Altona Important Bird Area
- Chek Jawa
- Chendytes
- Cherrie's Tanager
- Chesil Beach
- Chestnut-backed Bush Warbler
- Chestnut-backed Buttonquail
- Chestnut-backed Chickadee
- Chestnut-backed Laughingthrush
- Chestnut-backed Owlet
- Chestnut-backed Quail-thrush
- Chestnut-backed Sparrow-Lark
- Chestnut-backed Thornbird
- Chestnut-backed thrush
- Chestnut-bellied Flowerpiercer
- Chestnut-bellied Hummingbird
- Chestnut-bellied Imperial Pigeon
- Chestnut-bellied Monarch
- Chestnut-bellied Mountain Tanager
- Chestnut-bellied Nuthatch
- Chestnut-bellied Partridge
- Chestnut-bellied Rock Thrush
- Chestnut-bellied sandgrouse
- Chestnut-bellied Starling
- Chestnut-bellied thrush
- Chestnut-belted Gnateater
- Chestnut-breasted mannikin
- Chestnut-breasted Mountain Finch
- Chestnut-breasted nigrita
- Chestnut-breasted Partridge
- Chestnut-breasted Quail-thrush
- Chestnut-breasted Whiteface
- Chestnut-capped babbler
- Chestnut-capped Brush Finch
- Chestnut-capped Flycatcher
- Chestnut-capped Piha
- Chestnut-capped Puffbird
- Chestnut-capped thrush
- Chestnut-cheeked Starling
- Chestnut-collared Longspur
- Chestnut-coloured Woodpecker
- Chestnut-crested yuhina
- Chestnut-crowned Babbler
- Chestnut-crowned Becard
- Chestnut-crowned Bush Warbler
- Chestnut-crowned Laughingthrush
- Chestnut-crowned Sparrow-Weaver
- Chestnut-crowned Warbler
- Chestnut-eared Aracari
- Chestnut-eared Bunting
- Chestnut-faced babbler
- Chestnut-flanked Sparrowhawk
- Chestnut-flanked White-eye
- Chestnut-fronted Macaw
- Chestnut-headed Bee-eater
- Chestnut-headed Flufftail
- Chestnut-headed Nunlet
- Chestnut-headed Tesia
- Chestnut-hooded Laughingthrush
- Chestnut-mandibled Toucan
- Chestnut-naped Francolin
- Chestnut-necklaced Partridge
- Chestnut-quilled Rock Pigeon
- Chestnut-rumped Heathwren
- Chestnut-rumped Thornbill
- Chestnut-sided Warbler
- Chestnut-tailed Starling
- Chestnut-vented Nuthatch
- Chestnut-vented Warbler
- Chestnut-winged Chachalaca
- Chestnut-winged cuckoo
- Chestnut-winged Hookbill
- Chestnut-winged Starling
- Chestnut Antpitta
- Chestnut Bunting
- Chestnut munia
- Chestnut Rail
- Chestnut Seedeater
- Chestnut sparrow
- Chestnut Teal
- Chestnut Thrush
- Chestnut Wattle-eye
- Chestnut Wood Quail
- Chestnut Woodpecker
- Chew Valley Lake
- Cheyne Islands
- Chignecto Bay
- Chiguanco thrush
- Chihuahuan raven
- Chilbosan (North Hamgyong)
- Chilean flamingo
- Chilean Hawk
- Chilean Mockingbird
- Chilean Pintail
- Chilean Seaside Cinclodes
- Chilean Skua
- Chilean Woodstar
- Chilika Lake
- Chiloé Wigeon
- Chiltern-Mount Pilot National Park
- Chilton Polden
- Chilton Trinity
- Chiming Wedgebill
- Chinese Babax
- Chinese Bush Warbler
- Chinese egret
- Chinese Francolin
- Chinese Grassbird
- Chinese Grey Shrike
- Chinese Hill Warbler
- Chinese Hwamei
- Chinese Monal
- Chinese Nuthatch
- Chinese pond heron
- Chinese sparrowhawk
- Chinese thrush
- Chinspot Batis
- Chinstrap Cove
- Chinstrap Penguin
- Chintamoni Kar Bird Sanctuary
- Chippewa Nature Center
- Chipping Sparrow
- Chiribiquete Emerald
- Chirruping Wedgebill
- Chitrangudi Bird Sanctuary
- Chloridops
- Chlorostilbon
- Chocó Screech Owl
- Choco Toucan
- Chocó Trogon
- Choco Tyrannulet
- Chocó Vireo
- Chocolate-backed Kingfisher
- Chocolate Boobook
- Choiseul pigeon
- Chongchon River
- Chongdan Field
- Chopi blackbird
- Chotoy Spinetail
- Chowchilla
- Chris Mead
- Chris Perrins
- Christman Bird and Wildlife Sanctuary
- Christmas Emerald Dove
- Christmas Frigatebird
- Christmas Goshawk
- Christmas Imperial Pigeon
- Christmas Island
- Christmas Island (Tasmania)
- Christmas Swiftlet
- Christmas Thrush
- Christoffersen Island
- Christopher Helm
- Christopher James Alexander
- Christopher Merret
- Chubb's Cisticola
- Chubut Steamer Duck
- Chuck-will's-widow
- Chukar partridge
- Chunga (bird)
- Ciconia louisebolesae
- Ciconia maltha
- Ciconia nana
- Cierva Point and offshore islands Important Bird Area
- Çiğli
- Cimolopteryx
- Cinclodes
- Cinderella Waxbill
- Cinereous Bunting
- Cinereous Finch
- Cinereous tit
- Cinereous Vulture
- Cinereous Warbling Finch
- Cinnabar Boobook
- Cinnamon-banded Kingfisher
- Cinnamon-bellied Ground Tyrant
- Cinnamon-bellied Imperial Pigeon
- Cinnamon-breasted Bunting
- Cinnamon-breasted Whistler
- Cinnamon-browed Melidectes
- Cinnamon-chested Flycatcher
- Cinnamon-headed Green Pigeon
- Cinnamon-rumped Trogon
- Cinnamon-tailed Fantail
- Cinnamon-tailed Sparrow
- Cinnamon-throated Hermit
- Cinnamon-vented Piha
- Cinnamon Attila
- Cinnamon bittern
- Cinnamon Bracken Warbler
- Cinnamon Ground Dove
- Cinnamon ibon
- Cinnamon Quail-thrush
- Cinnamon Roller
- Cinnamon teal
- Cinnamon Warbling Finch
- Cinnamon Weaver
- CIPAMEX
- Ciridops
- Cirl Bunting
- Citadel Island
- Citreoline Trogon
- Citrine Lorikeet
- Citrine Wagtail
- Citron-crested Cockatoo
- Citron-headed Yellow Finch
- Clamorous Reed Warbler
- Clapper rail
- Clapperton's Francolin
- Clarión Wren
- Clark's grebe
- Clark's Nutcracker
- Clarke's Weaver
- Clarke Range
- Claud Buchanan Ticehurst
- Clay-colored Sparrow
- Clay-colored thrush
- Clear Creek, Ontario
- Cleeve Heronry
- Cliff Flycatcher
- Clifford Brodie Frith
- Cliffs of Moher
- Cliffy Island
- Clipperton Island
- Clive Finlayson
- Clive Minton
- Cloud-forest Screech Owl
- Cloven-feathered Dove
- Clump Mountain National Park
- Clyde River National Park
- Coal Tit
- Coastal cliffs between Porto Mosquito and Baia do Inferno Important Bird Area
- Coastal Miner
- Coastal Wet Tropics Important Bird Area
- Cobalt-winged Parakeet
- Cobb's Wren
- Coburg Island
- Cocha Antshrike
- Cochabamba Mountain Finch
- Cock-tailed Tyrant
- Cockatiel
- Cockburn Island (Antarctica)
- Cocoa thrush
- Cocoi heron
- Cocoparra National Park
- Cocos Buff-banded Rail
- Cocos cuckoo
- Cocos Finch
- Cocos Flycatcher
- Codfish Island
- Coffin Bay National Park
- Coffin Island
- Coiba Spinetail
- Coleto
- Colima Pygmy Owl
- Colima Warbler
- Colin Bibby
- Colin Harrison (ornithologist)
- Coll
- Collared Aracari
- Collared Babbler
- Collared Falconet
- Collared Finchbill
- Collared Flycatcher
- Collared Grosbeak
- Collared Imperial Pigeon
- Collared Inca
- Collared Kingfisher
- Collared Laughingthrush
- Collared Lory
- Collared Myna
- Collared Nightjar
- Collared Owlet
- Collared Pratincole
- Collared Puffbird
- Collared scops owl
- Collared Sparrowhawk
- Collared Sunbird
- Collared Towhee
- Collared Treepie
- Collared Trogon
- Collocalia buday
- Colombian Chachalaca
- Colombian Grebe
- Colombian Mountain Grackle
- Colorful Puffleg
- Columbian Sharp-tailed Grouse
- Comb-crested Jacana
- Combwich
- Comino
- Common Babbler
- Common Bird Monitoring of India
- Common black hawk
- Common blackbird
- Common bronzewing
- Common bulbul
- Common Buttonquail
- Common buzzard
- Common Cactus Finch
- Common chaffinch
- Common chiffchaff
- Common crane
- Common cuckoo
- Common Diving Petrel
- Common eider
- Common Emerald Dove
- Common firecrest
- Common Flameback
- Common gallinule
- Common goldeneye
- Common Grackle
- Common Grasshopper Warbler
- Common Green Magpie
- Common greenshank
- Common ground dove
- Common gull
- Common hawk-cuckoo
- Common Hill Myna
- Common house martin
- Common Iora
- Common jery
- Common kestrel
- Common Kingfisher
- Common Linnet
- Common Loon
- Common merganser
- Common Miner
- Common moorhen
- Common murre
- Common Myna
- Common Newtonia
- Common Nighthawk
- Common nightingale
- Common pheasant
- Common pochard
- Common Poorwill
- Common Potoo
- Common Quail
- Common raven
- Common Redpoll
- Common redshank
- Common Redstart
- Common Reed Bunting
- Common ringed plover
- Common Rock Thrush
- Common Rosefinch
- Common sandpiper
- Common Scoter
- Common Shelduck
- Common Smoky Honeyeater
- Common snipe
- Common starling
- Common Sunbird-Asity
- Common Swift
- Common Tailorbird
- Common tern
- Common Tody-Flycatcher
- Common Waxbill
- Common Whitethroat
- Common wood pigeon
- Common Woodshrike
- Common Yellowthroat
- Comoros blue pigeon
- Comoros olive pigeon
- Comoros thrush
- Compact Weaver
- Conception Island, Seychelles
- Cone-billed Tanager
- Confuciusornis
- Congo peacock
- Congo serpent eagle
- Connecticut Warbler
- Conondale Range
- Conquered Lorikeet
- Constantine Phipps, 2nd Baron Mulgrave
- Constantine Walter Benson
- Consumed Scrubfowl
- Conure
- Conwy RSPB reserve
- Cook's petrel
- Cook's Swift
- Cook Reed Warbler
- Coole Park
- Coomallo Important Bird Area
- Coombes Valley RSPB reserve
- Coongie Lakes
- Cooper's hawk
- Cooper's Island, Bermuda
- Cooper Floodplain below Windorah
- Coorong National Park
- Copepteryx
- Copinsay
- Copper-rumped Hummingbird
- Copper-throated Sunbird
- Copper Pheasant
- Copper Sunbird
- Coppersmith Barbet
- Coppery-headed Emerald
- Coppery-naped Puffleg
- Coppery Metaltail
- Coquerel's coua
- Coquet Island, England
- Coqui Francolin
- Cora Hartshorn Arboretum and Bird Sanctuary
- Coral-billed Scimitar Babbler
- Coraya Wren
- Cordillera Ground Warbler
- Cordilleran Flycatcher
- Cordoba Cinclodes
- Cordón Baquedano
- Coringa-Herald National Nature Reserve
- Cork Harbour
- Cormorant Island
- Corn Bunting
- Corn crake
- Cornell Lab of Ornithology
- Corner Inlet
- Correndera Pipit
- Corrimony
- Corsican Nuthatch
- Corte Madera Creek (Marin County, California)
- Corvitalusoides
- Cory's shearwater
- Cosmoledo
- Cossington, Somerset
- Costa's Hummingbird
- Costa Rican Brush Finch
- Cosumnes River Preserve
- Cotton Pygmy Goose
- Couch's Kingbird
- Coues' Gadwall
- Councillor Island
- Courbet Peninsula
- Cousin Island
- Cousine Island
- Cove Pond
- Cox's Sandpiper
- Coxen's Fig Parrot
- Cozumel Emerald
- Cozumel Thrasher
- Cozumel Vireo
- Crab-plover
- Cradle Mountain-Lake St Clair National Park
- Crag Chilia
- Crane hawk
- Cranes of Great Britain
- Cravens Peak Reserve
- Craveri's murrelet
- Creag Meagaidh
- Cream-bellied munia
- Cream-breasted Fruit Dove
- Cream-browed white-eye
- Cream-colored Woodpecker
- Cream-coloured Courser
- Cream-striped Bulbul
- Cream-throated White-eye
- Creamer's Field Migratory Waterfowl Refuge
- Creamy-bellied Antwren
- Creamy-bellied Gnatcatcher
- Creamy-bellied thrush
- Creamy-crested Spinetail
- Creamy-rumped Miner
- Crescent-chested babbler
- Crescent-chested Puffbird
- Crescent honeyeater
- Crested Ant Tanager
- Crested Argus
- Crested auklet
- Crested bellbird
- Crested Berrypecker
- Crested Black Tyrant
- Crested Bobwhite
- Crested Bunting
- Crested coua
- Crested drongo
- Crested Eagle
- Crested Finchbill
- Crested Fireback
- Crested Goshawk
- Crested Guan
- Crested Guineafowl
- Crested Honey Buzzard
- Crested Ibis
- Crested Kingfisher
- Crested Lark
- Crested Malimbe
- Crested Moa
- Crested Myna
- Crested Oropendola
- Crested Owl
- Crested Partridge
- Crested Pigeon
- Crested Quail-Dove
- Crested serpent eagle
- Crested shelduck
- Crested Shriketit
- Crested Tit-warbler
- Crested Treeswift
- Crested white-eye
- Creston Valley Wildlife Management Area
- Creswell Bay
- Cretaaviculus
- Cretan owl
- Cretzschmar's Bunting
- Crimson-backed Flameback
- Crimson-backed Sunbird
- Crimson-bellied Parakeet
- Crimson-breasted Finch
- Crimson-breasted Woodpecker
- Crimson-browed Finch
- Crimson-collared Grosbeak
- Crimson-crested Woodpecker
- Crimson-crowned flowerpecker
- Crimson-crowned Fruit Dove
- Crimson-fronted Barbet
- Crimson-fronted cardinal
- Crimson-headed Partridge
- Crimson-hooded Myzomela
- Crimson-rumped Myzomela
- Crimson-rumped Toucanet
- Crimson-rumped Waxbill
- Crimson Chat
- Crimson Finch
- Crimson Rosella
- Crimson Seedcracker
- Crimson Shining Parrot
- Crimson Sunbird
- Crimson Topaz
- Crinkle-collared Manucode
- Crissal Thrasher
- Croajingolong National Park
- Croaking Cisticola
- Crocodile Islands
- Cromarty Firth
- Crossley's ground thrush
- Crossley's vanga
- Crow-billed drongo
- Crow Honeyeater
- Crown Wetlands
- Crowned Chat-Tyrant
- Crowned Cormorant
- Crowned Eagle
- Crowned Hornbill
- Crowned sandgrouse
- Crowned Slaty Flycatcher
- Crowned Solitary Eagle
- Cruschedula
- Cryptic Antthrush
- Cryptic Flycatcher
- Cryptic Forest Falcon
- Cubalaya
- Cuban Amazon
- Cuban Black Hawk
- Cuban Blackbird
- Cuban Bullfinch
- Cuban crow
- Cuban Emerald
- Cuban flightless crane
- Cuban Gnatcatcher
- Cuban Green Woodpecker
- Cuban Ivory-billed Woodpecker
- Cuban Kite
- Cuban macaw
- Cuban Martin
- Cuban Oriole
- Cuban Parakeet
- Cuban Pauraque
- Cuban Pewee
- Cuban Pygmy Owl
- Cuban solitaire
- Cuban Tody
- Cuban trogon
- Cuban Vireo
- Cuckoo-finch
- Cuckoo Roller
- Cueva del Guácharo National Park
- Culbin Sands
- Cundinamarca Antpitta
- Curl-crested Aracari
- Curl-crested jay
- Curl-crested Manucode
- Curlew sandpiper
- Currawinya National Park
- Currawong
- Curry and Hay Moors
- Curtis Island (Tasmania)
- Curtis Island, New Zealand
- Cut-throat finch
- Cuverville Island
- Cuvier Island
- Cuzco Brush Finch
- Cwm Clydach RSPB Reserve
- Cyanoramphus
- Cygnus falconeri
- Cyprus Dipper
- Cyprus Warbler
- Cyprus Wheatear
- Cyril Hurcomb, 1st Baron Hurcomb
- D'Arnaud's Barbet
- D'Arros Island
- D'Orbigny's Chat-Tyrant
- D'Urville Monument
- D. L. Serventy Medal
- Daedong Bay Important Bird Area
- Daggett's Eagle
- Daintree Rainforest
- Daito Varied Tit
- Daito Wren
- Dalmatian pelican
- Damar Flycatcher
- Damar Island
- Damara Canary
- Damara Tern
- Dampier Saltworks Important Bird Area
- Dangara Massif Important Bird Area
- Danger Island
- Danger Islands
- Danggali Conservation Park
- Daniel Giraud Elliot
- Daniel S. Lehrman
- Darjeeling Woodpecker
- Dark-backed Imperial Pigeon
- Dark-backed Sibia
- Dark-backed Weaver
- Dark-billed cuckoo
- Dark-breasted Rosefinch
- Dark-eared Myza
- Dark-eyed Junco
- Dark-faced Ground Tyrant
- Dark-fronted Babbler
- Dark-necked Tailorbird
- Dark-rumped Rosefinch
- Dark-rumped Swift
- Dark-sided Flycatcher
- Dark-sided thrush
- Dark-throated Oriole
- Dark-throated Seedeater
- Dark-winged Miner
- Dark-winged Trumpeter
- Dark Batis
- Dark Chanting Goshawk
- Dark Newtonia
- Darter
- Dartford Warbler
- Darwin's finches
- Dashtidjum
- Daudmannsøyra Important Bird Area
- Daurian jackdaw
- Daurian Partridge
- Daurian Redstart
- Daurian Starling
- Davey Point
- David's Fulvetta
- David Allen Sibley
- David Armitage Bannerman
- David Baker-Gabb
- David Fleay
- David Gibbs (naturalist)
- David Haig-Thomas
- David Hunt (ornithologist)
- David Lack
- David Norman (ornithologist)
- David Snow
- David Steadman
- Dawn Whyatt Frith
- De Filippi's Petrel
- De Witt Island
- Dead Sea Sparrow
- Dean Amadon
- Decorah Bald Eagles
- Dee Estuary
- Deen Maar Indigenous Protected Area
- Deep-blue Flowerpiercer
- Degodi Lark
- Delta Amacuro Softtail
- Delta Marsh
- Demoiselle crane
- Dengie SPA
- Denham's Bustard
- Denis A. Saunders
- Dent Island, New Zealand
- Deny King
- Denzil Dean Harber
- Derek Barber, Baron Barber of Tewkesbury
- Derek Goodwin
- Derek Ratcliffe
- Derek Yalden
- Derwent Ings
- Desert Cisticola
- Desert Finch
- Desert Lark
- Desert Sparrow
- Desert Wheatear
- Desert Whitethroat
- Desertas Petrel
- Desmond Nethersole-Thompson
- Desnoeufs Island
- Detroit River International Wildlife Refuge
- Devil Island
- Devilbend Natural Features Reserve
- Devincenzia
- Devon Birdwatching and Preservation Society
- Dewey Soper Migratory Bird Sanctuary
- Diademed Plover
- Diademed Tanager
- Diamantina National Park
- Diamantina River
- Diamantina Tapaculo
- Diamond Dove
- Diamond Firetail
- Diard's Trogon
- Dickcissel
- Diederik cuckoo
- Dieffenbach's Rail
- Digges Sound
- Dillberry Lake Provincial Park
- Dilys Breese
- Dilys Breese Medal
- Dimorphic Fantail
- Dinelli's Doradito
- Dingle Peninsula
- Dinornis
- Diogenornis
- Dion Islands
- Disappointment Island
- Discovery Bay Coastal Park
- Dithmarscher Eiderwatt
- Djavshangoz Important Bird Area
- Djibouti francolin
- Doctor bird
- Dog Island, Anguilla
- Doherty's Bushshrike
- Dohrn's Thrush-Babbler
- Dok-do
- Dollarbird
- Domestic Show Flight
- Dominic Serventy
- Dominique G. Homberger
- Donald Sankey Farner
- Donald Thomson
- Donald Trounson
- Donald Watson (artist)
- Doria's Goshawk
- Doris Huestis Speirs
- Dornoch Firth
- Dorst's Cisticola
- Double-banded Plover
- Double-barred Finch
- Double-collared Seedeater
- Double-eyed Fig Parrot
- Double-spurred Francolin
- Double-toothed Barbet
- Doubtful Sound
- Doughboy Island East
- Doughboy Island West
- Douglas-Apsley National Park
- Douglas Dewar
- Dow's Puffin
- Dowker Island
- Downy Woodpecker
- Drab Myzomela
- Drab Water Tyrant
- Drab Whistler
- Dragon Rocks Nature Reserve
- Dragoon (pigeon)
- Drakensberg Prinia
- Drakensberg rockjumper
- Drakensberg Siskin
- Dream Island
- Dromaius
- Dromore, County Clare
- Dromornis
- Dromornithidae
- Drumkul
- Druridge Bay curlew
- Dry Creek, South Australia
- Dublin Bay
- Dubois's Seedeater
- Ducie Island
- Duck Island (Victoria)
- Duddon Estuary
- Dudley Le Souef
- Duida Grass Finch
- Duivenbode's Bird of Paradise
- Duivenbode's Riflebird
- Duivenbode's Six-wired Bird of Paradise
- Dulit Frogmouth
- Dull-blue Flycatcher
- Dune Lark
- Dune Shearwater
- Dunfanaghy
- Dunlin
- Dunn's Lark
- Dunn Rock and Lake King Important Bird Area
- Dunnet Head
- Dunnock
- Dunøyane Bird Sanctuary
- Durleigh
- Duroch Islands
- Dusky-backed Swift
- Dusky-billed Parrotlet
- Dusky-blue Flycatcher
- Dusky-brown Oriole
- Dusky-headed Brush Finch
- Dusky-headed Parakeet
- Dusky-legged Guan
- Dusky-tailed Canastero
- Dusky-throated Hermit
- Dusky Bush Tanager
- Dusky crag martin
- Dusky Crested Flycatcher
- Dusky Crimsonwing
- Dusky eagle-owl
- Dusky Friarbird
- Dusky Fulvetta
- Dusky Gerygone
- Dusky Grasswren
- Dusky grouse
- Dusky Indigobird
- Dusky long-tailed cuckoo
- Dusky Lory
- Dusky Megapode
- Dusky Moorhen
- Dusky munia
- Dusky Myzomela
- Dusky Parrot
- Dusky Robin
- Dusky seaside sparrow
- Dusky Sound
- Dusky Starfrontlet
- Dusky Tapaculo
- Dusky Tetraka
- Dusky thrush
- Dusky Tit
- Dusky Turtle Dove
- Dusky twinspot
- Dusky Warbler
- Dusky white-eye
- Dusky woodswallow
- Dwarf bittern
- Dwarf Fruit Dove
- Dwarf Jay
- Dwarf Sparrowhawk
- Dwarf Vireo
- Dwejra Bay to San Dimitri Point Important Bird Area
- Dybowski's twinspot
- E. Alexander Bergstrom
- E. C. Stuart Baker
- Eadie Island
- Eared Dove
- Eared Pitta
- Eared Poorwill
- Eared Quetzal
- East Andean Antbird
- East Bay Migratory Bird Sanctuary
- East Borden Important Bird Area
- East Brazilian Chachalaca
- East Island (Lacepede Islands)
- East Kangaroo Island
- East Moncoeur Island
- East of Nelly Point Important Bird Area
- East Pyramids
- East Wallabi Island
- Easter Group
- Eastern alpine mannikin
- Eastern Bearded Greenbul
- Eastern bluebird
- Eastern Bonelli's Warbler
- Eastern Bristlebird
- Eastern Canary Islands Chiffchaff
- Eastern Chanting Goshawk
- Eastern Chat-Tanager
- Eastern Clapper Lark
- Eastern Crowned Warbler
- Eastern Dry Forest
- Eastern Golden Weaver
- Eastern Grass Owl
- Eastern great egret
- Eastern Ground Parrot
- Eastern Habitat Joint Venture
- Eastern imperial eagle
- Eastern Kingbird
- Eastern Marsh Harrier
- Eastern Meadowlark
- Eastern Moa
- Eastern Olivaceous Warbler
- Eastern Orphean Warbler
- Eastern Parotia
- Eastern plantain-eater
- Eastern rock nuthatch
- Eastern Rockhopper Penguin
- Eastern Rosella
- Eastern Screech Owl
- Eastern slaty thrush
- Eastern Spinebill
- Eastern Towhee
- Eastern Treatment Plant
- Eastern Wattled Cuckooshrike
- Eastern Whip-poor-will
- Eastern Whipbird
- Eastern Yellow-billed Hornbill
- Eastern Yellow Robin
- Eastern Yellow Wagtail
- Eclectus Parrot
- Eclipse Island (Western Australia)
- Ecuadorian Cacique
- Ecuadorian ground dove
- Ecuadorian Hillstar
- Ecuadorian Piculet
- Ecuadorian Piedtail
- Ecuadorian thrush
- Ecuadorian Trogon
- Ecuadorian Tyrannulet
- Eddystone (Tasmania)
- Eden Landing Ecological Reserve
- Eden Rocks
- Edgar Alexander Mearns
- Edgar Chance
- Edgar Leopold Layard
- Edible-nest Swiftlet
- Edington, Somerset
- Edithvale-Seaford Wetlands
- Edmund Kennedy National Park
- Edmund Meade-Waldo
- Edmund Selous
- Edward Adrian Wilson
- Edward Allworthy Armstrong
- Edward Arthur Butler
- Edward Avery McIlhenny
- Edward Bartlett
- Edward Blyth
- Edward Donovan
- Edward Doubleday
- Edward Grey Institute of Field Ornithology
- Edward Grey, 1st Viscount Grey of Fallodon
- Edward Hargitt
- Edward Harris (ornithologist)
- Edward Hearle Rodd
- Edward Howe Forbush
- Edward Max Nicholson
- Edward Newton
- Edward Pierson Ramsay
- Edward Smith-Stanley, 13th Earl of Derby
- Edward Vernon Harcourt
- Edwards Point (Victoria)
- Edwin Ashby
- Egg Island, Horseshoe Reef
- Egg Islands
- Egyptian Goose
- Egyptian Nightjar
- Egyptian Plover
- Egyptian vulture
- Eiao Monarch
- Eider Islands
- Eighty Mile Beach
- Eillium Island
- El-Kouf National Park
- El Oro Parakeet
- El Oro Tapaculo
- Elegant Euphonia
- Elegant Imperial Pigeon
- Elegant Parrot
- Elegant Pitta
- Elegant Quail
- Elegant Sunbird
- Elegant Tit
- Elegant Trogon
- Elegant Woodcreeper
- Eleonora's Falcon
- Eleonora Cockatoo
- Elephant bird
- Elephant Cays
- Elephant Rocks
- Eleutherornis
- Elf Owl
- Elfin woods warbler
- Elgon francolin
- Eliza Phillips
- Elkhorn Slough
- Ella Bay National Park
- Ellen McCulloch
- Elliot's Bird of Paradise
- Elliot's Pheasant
- Elliott Coues
- Elliott McClure
- Elon Howard Eaton
- Elsie Naumburg
- Elusive Antpitta
- Emei Shan Liocichla
- Emerald-chinned Hummingbird
- Emerald-spotted Wood Dove
- Emerald Starling
- Emerald Toucanet
- Emily Williamson
- Emin's Shrike
- Emma Turner (photographer)
- Emperor Bird-of-paradise
- Emperor penguin
- Empress Brilliant
- Empress of Germany's Bird of Paradise
- Emu (journal)
- Emuarius
- Endemic Bird Area
- Endemic Bird Areas of the World: Priorities for Biodiversity Conservation
- Endemic birds of Colombia
- Endemic birds of eastern North America
- Endemic birds of Hawaii
- Endemic birds of Indonesia
- Endemic birds of Japan
- Endemic birds of Madagascar and western Indian Ocean islands
- Endemic birds of Mexico and northern Central America
- Endemic birds of New Caledonia
- Endemic birds of New Zealand
- Endemic birds of South Asia
- Endemic birds of southern Africa
- Endemic birds of Sulawesi
- Endemic birds of the Andaman and Nicobar Islands
- Endemic birds of the Galápagos Islands
- Endemic birds of the Himalayas
- Endemic birds of the West Indies
- Endemic birds of the Western Palearctic
- Endemic birds of western and central Africa
- Endemic birds of western North America
- Enderby Island
- Enggano Hill Myna
- Enggano scops owl
- Enggano thrush
- Enggano White-eye
- English Carrier
- English Fantail
- English Island (South Australia)
- English Long Faced Tumbler
- English Pouter
- English Short Faced Tumbler
- English Trumpeter
- Eoalulavis
- Eoanseranas
- Eocypselus rowei
- Eonessa
- Erckel's francolin
- Erect-crested Penguin
- Ergaticus
- Erhard F. Boehm
- Eric Ennion
- Eric Hosking
- Eric Simms (ornithologist)
- Eriocnemis
- Erlanger's Lark
- Ernest Thomas Gilliard
- Ernst Mayr
- Erskine Island
- Escarpada Point
- Escudo Hummingbird
- Esmeraldas Woodstar
- Ethabuka Reserve
- Ethiopian Oriole
- Ethiopian Siskin
- Ethiopian Swallow
- Etoile Island (Seychelles)
- Eubenangee Swamp National Park
- Eugene Eisenmann
- Eugene Pintard Bicknell
- Eugene William Oates
- Euler's Flycatcher
- Eungella honeyeater
- Eurasian bittern
- Eurasian blackcap
- Eurasian Blue Tit
- Eurasian Bullfinch
- Eurasian Collared Dove
- Eurasian coot
- Eurasian crag martin
- Eurasian Crimson-winged Finch
- Eurasian curlew
- Eurasian dotterel
- Eurasian eagle-owl
- Eurasian Golden Oriole
- Eurasian hobby
- Eurasian Jay
- Eurasian magpie
- Eurasian nuthatch
- Eurasian oystercatcher
- Eurasian Penduline Tit
- Eurasian Pygmy Owl
- Eurasian Reed Warbler
- Eurasian Rock Pipit
- Eurasian scops owl
- Eurasian Siskin
- Eurasian Skylark
- Eurasian sparrowhawk
- Eurasian Spoonbill
- Eurasian Stone-curlew
- Eurasian teal
- Eurasian Three-toed Woodpecker
- Eurasian tree sparrow
- Eurasian treecreeper
- Eurasian wigeon
- Eurasian woodcock
- Eurasian Wren
- Eurasian wryneck
- Eurobodalla National Park
- Europa Island
- European Bee-eater
- European Crested Tit
- European golden plover
- European Goldfinch
- European Green Woodpecker
- European Greenfinch
- European Herring Gull
- European Honey Buzzard
- European nightjar
- European Pied Flycatcher
- European robin
- European Roller
- European Serin
- European Shag
- European Stonechat
- European storm petrel
- European Turtle Dove
- Eurotrochilus
- Evening Grosbeak
- Everett's scops owl
- Everett's thrush
- Evergreen Forest Warbler
- Eversmann's Redstart
- Ewing Island, New Zealand
- Exclamatory Paradise Whydah
- Exmouth Gulf
- Eye-ringed Flatbill
- Eye-ringed Thistletail
- Eye-ringed Tody-Tyrant
- Eyebrowed Jungle Flycatcher
- Eyebrowed thrush
- Eyebrowed Wren-Babbler
- Eyles' harrier
- Eyre Bird Observatory
- Eyre Creek (New Zealand)
- Eyrean Grasswren
- Eysturoy
- Fairburn Ings RSPB reserve
- Fairfax Islands
- Fairy Flycatcher
- Fairy Lorikeet
- Fairy Martin
- Fairy Pitta
- Fairy Prion
- Fairy Tern
- Falaises d'Entrecasteaux
- Falcated duck
- Falcated Wren-Babbler
- Falkenstein's Greenbul
- Falkland Steamer Duck
- False-lobed Astrapia
- False Round Point
- Familiar Chat
- Fan-tailed cuckoo
- Fan-tailed gerygone
- Fan-tailed Grassbird
- Fan-tailed raven
- Fanad
- Fanti Saw-wing
- Far Eastern curlew
- Farmer Island
- Farne Islands
- Faroese puffin
- Farquhar Atoll
- Fasciated tiger heron
- Fatumasin
- Faure Island
- Fawn-breasted bowerbird
- Fawn-breasted Brilliant
- Fawn-breasted thrush
- Fawn-breasted Waxbill
- Fawn-breasted Whistler
- Fawn-breasted Wren
- Fawn-coloured Lark
- Fea's petrel
- Fearful owl
- Fen Drayton
- Feral Pigeon
- Ferguslie Peninsula
- Fermín Zanón Cervera
- Fernandina's Flicker
- Fernando Po Batis
- Fernando Po Speirops
- Fernwren
- Ferrier Peninsula
- Ferruginous Antbird
- Ferruginous Duck
- Ferruginous Flycatcher
- Ferruginous hawk
- Ferruginous Pygmy Owl
- Festive Amazon
- Festive Coquette
- Fetlar
- Field Sparrow
- Fieldfare
- Fiery-billed Aracari
- Fiery-breasted Bushshrike
- Fiery-browed Starling
- Fiery-capped Manakin
- Fiery-necked Nightjar
- Fiery-throated Metaltail
- Fiery Topaz
- Fiji Bush Warbler
- Fiji Goshawk
- Fiji parrotfinch
- Fiji Petrel
- Fiji Shrikebill
- Fiji Whistler
- Fiji white-eye
- Fiji Woodswallow
- Filfla
- Fine-barred Piculet
- Fine-spotted Woodpecker
- Finn's Weaver
- Finsch's Duck
- Finsch's Imperial Pigeon
- Finsch's rufous thrush
- Finsch's Wheatear
- Fiordland penguin
- Fire-bellied Woodpecker
- Fire-breasted Flowerpecker
- Fire-capped Tit
- Fire-crested alethe
- Fire-eyed Diucon
- Fire-maned Bowerbird
- Fire-tailed Myzornis
- Fire-tailed Sunbird
- Firethroat
- Fiscal Flycatcher
- Fischer's Lovebird
- Fischer's Starling
- Fish crow
- Fish Ponds and Crossing Place Trail Important Bird Area
- Fisher Island (Queensland)
- Fitzgerald River National Park
- Fitzroy River (Queensland)
- Five-coloured Barbet
- Five-coloured munia
- Five-striped Sparrow
- Fivebough and Tuckerbil Swamps
- Fladda, Treshnish Isles
- Flame-breasted flowerpecker
- Flame-breasted Fruit Dove
- Flame-breasted Sunbird
- Flame-colored Tanager
- Flame-crowned flowerpecker
- Flame-eared Honeyeater
- Flame-fronted Barbet
- Flame-rumped Sapphire
- Flame-templed babbler
- Flame-throated Bulbul
- Flame-winged Parakeet
- Flame Bowerbird
- Flame robin
- Flamecrest
- Flaming Sunbird
- Flamingo Gardens
- Flammulated Bamboo Tyrant
- Flammulated flycatcher
- Flammulated owl
- Flappet Lark
- Flat-billed Kingfisher
- Flat-billed Vireo
- Flat Holm
- Flat Top Island
- Flat Witch Island
- Flavescent Bulbul
- Flesh-footed shearwater
- Flightless Cormorant
- Flinders Island
- Flinders Island (South Australia)
- Flinders Ranges National Park
- Flock Bronzewing
- Flora and fauna of Greenland
- Floreana Mockingbird
- Florence Augusta Merriam Bailey
- Flores crow
- Flores Green Pigeon
- Flores Hawk-Eagle
- Flores Monarch
- Flores scops owl
- Florida Ornithological Society
- Florida Scrub Jay
- Flowerpot Bay
- Fluttering Shearwater
- Flycatcher-shrike
- Flying Steamer Duck
- Fog Bay and Finniss River Floodplains
- Fogg Dam Conservation Reserve
- Fogo Volcanic Important Bird Area
- Folly Island, New Zealand
- Foothill Schiffornis
- Foothill Screech Owl
- Forbes' Snipe
- Forbes's blackbird
- Forbes's mannikin
- Forbes's Plover
- Forest Batis
- Forest Bay Pond
- Forest Bittern
- Forest Elaenia
- Forest Fody
- Forest Kingfisher
- Forest Owlet
- Forest Penduline Tit
- Forest raven
- Forest Robin
- Forest Rock Thrush
- Forest swallow
- Forest thrush
- Forest Wagtail
- Fork-tailed drongo
- Fork-tailed drongo-cuckoo
- Fork-tailed Flycatcher
- Fork-tailed storm petrel
- Fork-tailed Tody-Tyrant
- Forlandet National Park
- Forlandsøyane Bird Sanctuary
- Formicariidae
- Foro (bird)
- Forsinard Flows
- Forsyth Island
- Fort Amsterdam (Sint Maarten)
- Fort Custer Recreation Area
- Fort Custer Training Center
- Fortescue River
- Forty-Fours
- Forty-spotted Pardalote
- Four-banded sandgrouse
- Four Pests Campaign
- Fowlmere RSPB reserve
- Fowlsheugh
- Fox's Weaver
- Fox Kestrel
- Fox Sparrow
- Frances's Sparrowhawk
- Frances Adams Le Sueur
- Francis Charles Robert Jourdain
- Francis Orpen Morris
- Francis Willughby
- Frank Chapman (ornithologist)
- Frank Finn
- Frank Fraser Darling
- Frank Gill (ornithologist)
- Frank Knight (artist)
- Frank Lake (Alberta)
- Frank Ludlow
- Frank Norman Robinson
- Frank Pitelka
- Frank Sound Forest
- Franklin's Forest
- Franklin's gull
- Franklin Sound Islands Important Bird Area
- Fraser's eagle-owl
- Fraser's Forest Flycatcher
- Fraser's rufous thrush
- Fraser Island
- Fraser Island (Nunavut)
- Fraser Point
- Freckled Duck
- Freckled Nightjar
- Fred Shaw Mayer
- Fred Sheldon (ornithologist)
- Frederick Albion Ober
- Frederick Charles Lincoln
- Frederick DuCane Godman
- Frederick George Waterhouse
- Frederick John Jackson
- Frederick Nicholson Betts
- Frederick Nutter Chasen
- Frederick Webb Headley
- Fredriksen Island
- Frégate Island
- Freiston
- Freycinet Island
- Friendly Bush Warbler
- Frilled Coquette
- Fringe-backed Fire-eye
- Fruithunter
- Fuegian Steamer Duck
- Fuertes's Parrot
- Fuglefjella Important Bird Area
- Fugloy
- Fülleborn's Boubou
- Fülleborn's Longclaw
- Fulvous-breasted Woodpecker
- Fulvous-crested Tanager
- Fulvous Antshrike
- Fulvous Babbler
- Fulvous Owl
- Fulvous Parrotbill
- Fulvous Wren
- Fur Seal Point
- Furtive Flycatcher
- Fuscous Flycatcher
- Fuscous Honeyeater
- Gabar Goshawk
- Gabela Akalat
- Gabela Bushshrike
- Gabela Helmetshrike
- Gabo Island
- Gabon Batis
- Gabon coucal
- Gabon Forest Robin
- Gabon Woodpecker
- Gadwall
- Gailey Reservoirs
- Galah
- Galapagos Crake
- Galápagos Dove
- Galapagos Flycatcher
- Galapagos Hawk
- Galápagos Martin
- Galápagos Mockingbird
- Galapagos Penguin
- Galápagos petrel
- Galbula hylochoreutes
- Gallicolumba
- Gallornis
- Gambaga Flycatcher
- Gambel's quail
- Gamgul
- Gang-gang Cockatoo
- Gannet Island (New Zealand)
- Gannet Islands Ecological Reserve
- Gannet Rock
- Gansu Leaf Warbler
- Garden Emerald
- Garden warbler
- Garganey
- Garston Wood
- Gartered Trogon
- Garth Christian
- Gåsøyane Bird Sanctuary
- Gastornis
- Gavin Wildridge Johnstone
- Gawler Ranges National Park
- Geelvink Pygmy Parrot
- Gentoo Penguin
- Genyornis
- Geoffrey Francis Archer
- Geoffrey Herklots
- George Archibald (ornithologist)
- George Arthur Keartland
- George Augustus Boardman
- George Barnard (zoologist)
- George Bartholomew (biologist)
- George Bristow (ornithologist)
- George Burritt Sennett
- George C. Reifel Migratory Bird Sanctuary
- George Dawson Rowley
- George Dunnet
- George Edward Lodge
- George Edwards (naturalist)
- George Ernest Shelley
- George Henry Caton Haigh
- George Latimer Bates
- George Mack (ornithologist)
- George Miksch Sutton
- George Montagu (naturalist)
- George Newbold Lawrence
- George Ord
- George Robert Gray
- George Waterston
- Georgia Ornithological Society
- Geranopterus
- Gerard Frederick van Tets
- Gerlache Island
- Germain's Peacock-Pheasant
- Giant Babax
- Giant Conebill
- Giant Coot
- Giant Coua
- Giant Cowbird
- Giant Honeyeater
- Giant Hummingbird
- Giant Ibis
- Giant Kingbird
- Giant Kingfisher
- Giant Malleefowl
- Giant Nukupu‘u
- Giant scops owl
- Giant Snipe
- Giant Sunbird
- Giant Weaver
- Giant white-eye
- Giant Wren
- Gibberbird
- Gibbon Bay
- Gibbs Island (South Shetland Islands)
- Gibraltar Nature Reserve
- Gibraltar Point
- Gibraltar Range National Park
- Gidgegannup Important Bird Area
- Gila Woodpecker
- Gilbert's Whistler
- Gilbert Dempster Fisher
- Gilbert White
- Gilded Barbet
- Gilded Flicker
- Gilded Sapphire
- Gillett's Lark
- Gilliard's Bird of Paradise
- Gilliard's Melidectes
- Gillingarra Important Bird Area
- Gilt-edged Tanager
- Ginger Islands
- Gippsland Lakes
- Girringun National Park
- Gizo White-eye
- Glamorgan Bird Club
- Glastonbury
- Glastonbury Lake Village
- Glastonbury Thorn
- Glaucous gull
- Glaucous Macaw
- Glen Chilton
- Glen Milton Storr
- Glenborrodale
- Glenveagh
- Glittering-bellied Emerald
- Glittering-throated Emerald
- Glittering Kingfisher
- Glossy-black thrush
- Glossy-mantled Manucode
- Glossy Antshrike
- Glossy Black Cockatoo
- Glossy ibis
- Glossy Swiftlet
- Glow-throated Hummingbird
- Gluepot Reserve
- Gnateater
- Goat Island / Rakiriri
- Gobipteryx
- Godlewski's Bunting
- Godney
- Gola Malimbe
- Gold-ringed Tanager
- Goldcrest
- Golden-backed Mountain Tanager
- Golden-bellied flyrobin
- Golden-bellied Starfrontlet
- Golden-bellied White-eye
- Golden-billed Saltator
- Golden-breasted Bunting
- Golden-breasted fulvetta
- Golden-breasted Puffleg
- Golden-breasted Starling
- Golden-browed Chat-Tyrant
- Golden-browed Warbler
- Golden-cheeked Warbler
- Golden-cheeked Woodpecker
- Golden-chevroned Tanager
- Golden-collared Macaw
- Golden-collared Toucanet
- Golden-collared Woodpecker
- Golden-crested Myna
- Golden-crowned babbler
- Golden-crowned Manakin
- Golden-fronted Bowerbird
- Golden-fronted Fulvetta
- Golden-fronted Leafbird
- Golden-fronted Whitestart
- Golden-fronted Woodpecker
- Golden-green Woodpecker
- Golden-headed Cisticola
- Golden-headed Manakin
- Golden-headed Quetzal
- Golden-mantled Racket-tail
- Golden-naped Barbet
- Golden-naped Finch
- Golden-naped Weaver
- Golden-olive Woodpecker
- Golden-plumed Parakeet
- Golden-rumped flowerpecker
- Golden-shouldered Parrot
- Golden-tailed Parrotlet
- Golden-tailed Woodpecker
- Golden-throated Barbet
- Golden-winged Laughingthrush
- Golden-winged Parakeet
- Golden-winged Sunbird
- Golden-winged Warbler
- Golden babbler
- Golden bowerbird
- Golden Bush Robin
- Golden eagle
- Golden Fruit Dove
- Golden Gate Raptor Observatory
- Golden Greenbul
- Golden masked owl
- Golden Monarch
- Golden Nightjar
- Golden Parakeet
- Golden Parrotbill
- Golden Pheasant
- Golden Swallow (bird)
- Golden Vireo
- Golden white-eye
- Goldie's Bird-of-paradise
- Goldie's Lorikeet
- Golfe du Morbihan (Kerguelen)
- Goliath coucal
- Goliath heron
- Goliath Imperial Pigeon
- Goonengerry National Park
- Goonoo Important Bird Area
- Goose Island (South Australia)
- Goose Island (Tasmania)
- Gordon Beruldsen
- Gordon Orians
- Gorgeted Puffleg
- Gorgeted Sunangel
- Gorgeted Wood Quail
- Gorgeted Woodstar
- Gosling's Apalis
- Gosling Islands
- Gough Island
- Goulburn River National Park
- Gould's Emerald
- Gould's Inca
- Gould's Shortwing
- Gould's Toucanet
- Gouldian Finch
- Gourdin Island
- Gower Ornithological Society
- Goyder Lagoon
- Grace's Warbler
- Graceanna Lewis
- Graceful Pitta
- Graceful Prinia
- Gracile Goshawk
- Gracius Broinowski
- Graham Pizzey
- Grand Bassin – Le Dimitile Important Bird Area
- Grand Bénard – Tapcal Important Bird Area
- Grand Cayman thrush
- Grand Codroy Estuary
- Grand Colombier
- Grand Comoro drongo
- Grand Rhabdornis
- Grandala
- Granite Downs
- Grant's Bluebill
- Graptolite Island
- Grass warbler
- Grassholm
- Grasshopper Buzzard
- Grasshopper Sparrow
- Grassland Yellow Finch
- Grauer's Swamp Warbler
- Gray-crowned Rosy Finch
- Gray-headed Chickadee
- Gray catbird
- Gray jay
- Gray Kingbird
- Gray Thrasher
- Gray Vireo
- Great-billed Hermit
- Great-billed heron
- Great-billed Kingfisher
- Great-billed mannikin
- Great-billed Parrot
- Great-tailed Grackle
- Great-winged petrel
- Great Antpitta
- Great Antshrike
- Great Argus
- Great auk
- Great Barbet
- Great Basin Bird Observatory
- Great black-backed gull
- Great blue heron
- Great blue turaco
- Great Bowerbird
- Great Bustard
- Great cormorant
- Great crested flycatcher
- Great Crested Grebe
- Great Cuckoo-Dove
- Great Curassow
- Great Dog Island (Tasmania)
- Great Eared Nightjar
- Great egret
- Great Elaenia
- Great frigatebird
- Great Grebe
- Great Green Macaw
- Great grey owl
- Great Grey Shrike
- Great Ground Dove
- Great Hanging Parrot
- Great Hornbill
- Great horned owl
- Great Inca Finch
- Great Indian Bustard
- Great Kiskadee
- Great knot
- Great lizard cuckoo
- Great Maui Crake
- Great Nicobar serpent eagle
- Great northern loon
- Great O‘ahu Crake
- Great Otway National Park
- Great Parrotbill
- Great Plain of the Koukdjuak
- Great Potoo
- Great Reed Warbler
- Great Rufous Woodcreeper
- Great Sandy National Park
- Great Sandy Strait
- Great shearwater
- Great Shortwing
- Great skua
- Great Slaty Woodpecker
- Great snipe
- Great Sparrow
- Great Spinetail
- Great spotted cuckoo
- Great Spotted Woodpecker
- Great Stone-curlew
- Great thrush
- Great tit
- Great white pelican
- Great Woodswallow
- Great Xenops
- Greater adjutant
- Greater Akialoa
- Greater ʻAmakihi
- Greater Antillean Bullfinch
- Greater Antillean Elaenia
- Greater Antillean Grackle
- Greater Antillean Nightjar
- Greater Bendigo National Park
- Greater Bird-of-paradise
- Greater Blue-eared Starling
- Greater Blue Mountains Area
- Greater coucal
- Greater crested tern
- Greater Double-collared Sunbird
- Greater Flameback
- Greater flamingo
- Greater green leafbird
- Greater ground robin
- Greater Honeyguide
- Greater Hoopoe-Lark
- Greater Kestrel
- Greater Koa Finch
- Greater Melampitta
- Greater Necklaced Laughingthrush
- Greater Painted-snipe
- Greater Pewee
- Greater prairie chicken
- Greater racket-tailed drongo
- Greater roadrunner
- Greater sage-grouse
- Greater sand plover
- Greater scaup
- Greater Short-toed Lark
- Greater Sooty Owl
- Greater Spotted Eagle
- Greater Striped Swallow
- Greater Sulphur-crested Cockatoo
- Greater Swamp Warbler
- Greater white-fronted goose
- Greater yellow-headed vulture
- Greater yellowlegs
- Greater Yellownape
- Green-and-gold Tanager
- Green-and-rufous Kingfisher
- Green-and-white Hummingbird
- Green-backed Camaroptera
- Green-backed Eremomela
- Green-backed Firecrown
- Green-backed Honeyeater
- Green-backed Kingfisher
- Green-backed Sparrow
- Green-backed Tit
- Green-backed Trogon
- Green-backed Twinspot
- Green-backed Whistler
- Green-backed white-eye
- Green-bellied Hummingbird
- Green-billed coucal
- Green-billed malkoha
- Green-billed Toucan
- Green-breasted Bushshrike
- Green-breasted Mango
- Green-breasted Pitta
- Green-capped Tanager
- Green-cheeked Parakeet
- Green-crowned Brilliant
- Green-crowned Warbler
- Green-crowned Woodnymph
- Green-eared Barbet
- Green-faced Parrotfinch
- Green-headed Hillstar
- Green-headed Oriole
- Green-headed Sunbird
- Green-headed Tanager
- Green-legged Partridge
- Green-rumped Parrotlet
- Green-striped Brush Finch
- Green-tailed Emerald
- Green-tailed Jacamar
- Green-tailed Sunbird
- Green-tailed Towhee
- Green-tailed Warbler
- Green-throated Carib
- Green-throated Mango
- Green-throated Sunbird
- Green-winged Pytilia
- Green-winged Saltator
- Green-winged teal
- Green Aracari
- Green Avadavat
- Green Bee-eater
- Green Broadbill
- Green Catbird
- Green cochoa
- Green Crombec
- Green Figbird
- Green Hermit
- Green heron
- Green Honeycreeper
- Green Hylia
- Green Ibis
- Green Imperial Pigeon
- Green Island (Okaihe)
- Green jay
- Green jery
- Green Junglefowl
- Green Kingfisher
- Green Longtail
- Green Manakin
- Green Mango
- Green oriole
- Green Parakeet
- Green peafowl
- Green Pheasant
- Green Pygmy Goose
- Green Racket-tail
- Green Rosella
- Green sandpiper
- Green Shrike-babbler
- Green Thorntail
- Green Violetear
- Green Warbler
- Green Warbler-Finch
- Green Wood Hoopoe
- Greene Smith
- Greenish Elaenia
- Greenish Mourner
- Greenish Schiffornis
- Greenish Warbler
- Greenly Island, Canada
- Gregory Mathews
- Grenada dove
- Grenen
- Grey-backed Cisticola
- Grey-backed Fiscal
- Grey-backed Shrike
- Grey-backed Storm Petrel
- Grey-backed Tachuri
- Grey-backed thrush
- Grey-banded mannikin
- Grey-barred Wren
- Grey-bellied Comet
- Grey-bellied cuckoo
- Grey-bellied Flowerpiercer
- Grey-bellied Tesia
- Grey-breasted Crake
- Grey-breasted Parakeet
- Grey-breasted partridge
- Grey-breasted Prinia
- Grey-breasted Sabrewing
- Grey-breasted Wood Wren
- Grey-breasted Woodpecker
- Grey-browed Brush Finch
- Grey-brown white-eye
- Grey-capped Greenfinch
- Grey-capped Hemispingus
- Grey-capped Pygmy Woodpecker
- Grey-capped Social Weaver
- Grey-capped Tyrannulet
- Grey-cheeked Fulvetta
- Grey-cheeked Green Pigeon
- Grey-cheeked Parakeet
- Grey-cheeked thrush
- Grey-cheeked Tit-Babbler
- Grey-cheeked Warbler
- Grey-chested babbler
- Grey-chinned Hermit
- Grey-chinned Minivet
- Grey-chinned Sunbird
- Grey-collared Oriole
- Grey-crowned Crocias
- Grey-crowned mannikin
- Grey-crowned Prinia
- Grey-crowned Tanager
- Grey-crowned Tetraka
- Grey-crowned Warbler
- Grey-crowned Woodpecker
- Grey-eared Brush Finch
- Grey-eared Honeyeater
- Grey-faced Buzzard
- Grey-fronted Dove
- Grey-fronted Honeyeater
- Grey-fronted Quail-Dove
- Grey-green Fruit Dove
- Grey-headed Albatross
- Grey-headed Batis
- Grey-headed Broadbill
- Grey-headed Bulbul
- Grey-headed Bullfinch
- Grey-headed Bushshrike
- Grey-headed Canary-flycatcher
- Grey-headed Fish Eagle
- Grey-headed Fruit Dove
- Grey-headed Goshawk
- Grey-headed Greenbul
- Grey-headed gull
- Grey-headed Honeyeater
- Grey-headed Imperial Pigeon
- Grey-headed kingfisher
- Grey-headed Lapwing
- Grey-headed Lovebird
- Grey-headed mannikin
- Grey-headed nigrita
- Grey-headed oliveback
- Grey-headed Parakeet
- Grey-headed Parrotbill
- Grey-headed silverbill
- Grey-headed Spinetail
- Grey-headed Sunbird
- Grey-headed Warbler
- Grey-headed Woodpecker
- Grey-hooded Attila
- Grey-hooded Parrotbill
- Grey-hooded Sunbird
- Grey-hooded Warbler
- Grey-hooded white-eye
- Grey-lined Hawk
- Grey-naped Antpitta
- Grey-necked Bunting
- Grey-necked rockfowl
- Grey-necked Wood Rail
- Grey-rumped Swallow
- Grey-rumped Swift
- Grey-sided Bush Warbler
- Grey-sided Flowerpecker
- Grey-sided Laughingthrush
- Grey-sided thrush
- Grey-tailed Mountaingem
- Grey-tailed tattler
- Grey-throated babbler
- Grey-throated Barbet
- Grey-throated Chat
- Grey-throated Rail
- Grey-throated Sunbird
- Grey-throated Tit-Flycatcher
- Grey-throated white-eye
- Grey-winged blackbird
- Grey-winged Cotinga
- Grey-winged francolin
- Grey-winged Inca Finch
- Grey-winged Robin-Chat
- Grey-winged Trumpeter
- Grey Apalis
- Grey Bunting
- Grey Bush Chat
- Grey Butcherbird
- Grey Crested Tit
- Grey crow
- Grey crowned crane
- Grey Cuckooshrike
- Grey currawong
- Grey Emutail
- Grey Falcon
- Grey fantail
- Grey francolin
- Grey go-away-bird
- Grey Goshawk
- Grey Grasswren
- Grey ground thrush
- Grey Gull
- Grey hawk
- Grey heron
- Grey Honeyeater
- Grey Hypocolius
- Grey Island (South Orkney Islands)
- Grey Junglefowl
- Grey Kestrel
- Grey Longbill
- Grey Nightjar
- Grey partridge
- Grey peacock-pheasant
- Grey Peaks National Park
- Grey plover
- Grey Pond
- Grey Pratincole
- Grey Shrikethrush
- Grey Sibia
- Grey Silky-flycatcher
- Grey Teal
- Grey Tit-Flycatcher
- Grey Treepie
- Grey Trembler
- Grey Wagtail
- Grey warbler
- Grey Warbler-Finch
- Grey Waxbill
- Grey Woodpecker
- Grey Wren
- Grey Wren-Warbler
- Greyish Eagle-Owl
- Greyish Miner
- Greyish Piculet
- Greyish Saltator
- Greylag goose
- Griffith Wetlands Important Bird Area
- Griffon Vulture
- Grimwood's Longclaw
- Groove-billed ani
- Groove-billed Toucanet
- Grosbeak Starling
- Ground Cuckooshrike
- Ground hornbill
- Ground roller
- Ground Tit
- Ground Woodpecker
- Groundscraper thrush
- Grouse
- Growling Riflebird
- Grus pagei
- Guadalcanal Honeyeater
- Guadalcanal thrush
- Guadalupe caracara
- Guadalupe Junco
- Guadalupe murrelet
- Guadalupe Storm Petrel
- Guadeloupe Amazon
- Guadeloupe Parakeet
- Guadeloupe Woodpecker
- Guaiabero
- Guaiquinima Whitestart
- Guam Flycatcher
- Guamblin Island
- Guanay Cormorant
- Guatemalan Pygmy Owl
- Gudavi Bird Sanctuary
- Guépratte Island
- Guianan cock-of-the-rock
- Guianan Gnatcatcher
- Guianan Puffbird
- Guianan Red Cotinga
- Guianan Schiffornis
- Guianan Toucanet
- Guianan Tyrannulet
- Guianan Warbling Antbird
- Guillemot
- Guinea turaco
- Guineafowl
- Guira cuckoo
- Guissezholmen Bird Sanctuary
- Gulaga National Park
- Güldenstädt's Redstart
- Gulf Plains Important Bird Area
- Gulf St Vincent Important Bird Area
- Gull-billed tern
- Gull Island (Tasmania)
- Gum Lagoon Conservation Park
- Gun Island
- Gundlach's Hawk
- Gunnison Grouse
- Gurilynia
- Gurney's eagle
- Gurney's Pitta
- Gurney's Sugarbird
- Guttulate Foliage-gleaner
- Guy Dutson
- Guy Mountfort
- Gwydir Wetlands
- Gymnogyps varonai
- Gyrfalcon
- Gyrfalcon Islands
- H. C. Yarrow
- Haast's eagle
- Hachiroungou Important Bird Area
- Hadada Ibis
- Hainan Leaf Warbler
- Hainan Partridge
- Hainan Peacock-Pheasant
- Hair-crested drongo
- Hairy-breasted Barbet
- Hairy Hermit
- Hairy Woodpecker
- Half-collared Sparrow
- Half Moon Island
- Halimornis
- Hall's Babbler
- Halmahera Cuckooshrike
- Halmahera Flowerpecker
- Ham Wall
- Hamerkop
- Hammond's Flycatcher
- Handa, Scotland
- Handbook of Australian, New Zealand and Antarctic Birds
- Handbook of the Birds of India and Pakistan
- Handsome Francolin
- Handsome Fruiteater
- Handsome Sunbird
- Hangnest Tody-Tyrant
- Hannah Bay
- Hans and Pat Suter Wildlife Refuge
- Hantzsch Island
- Happy Wren
- Harbour Islets
- Hardhead
- Harlequin Antbird
- Harlequin duck
- Harlequin Quail
- Harmony Point
- Harold Douglas Pratt, Jr.
- Harold Frith
- Harold Hall Australian Expeditions
- Harold Raeburn
- Harpy eagle
- Harriet Mann Miller
- Harris's hawk
- Harris's Sparrow
- Harris, Scotland
- Harry Church Oberholser
- Harry Forbes Witherby
- Harry Frederick Recher
- Harry Gibbons Migratory Bird Sanctuary
- Harry Morrey Salmon
- Harry Wolstenholme
- Harsens Island
- Hartlaub's Duck
- Hartlaub's Gull
- Hartlaub's Spurfowl
- Hartlaub's turaco
- Harwood's Francolin
- Hastings-Macleay Important Bird Area
- Hastings Rarities
- Hastings Russell, 12th Duke of Bedford
- Hattah-Kulkyne National Park
- Haul Round Island
- Hauxwell's thrush
- Havergate Island
- Hawai'i Mamo
- Hawaiʻi ‘Elepaio
- Hawaiʻi ʻAmakihi
- Hawaii Audubon Society
- Hawaiʻi Creeper
- Hawaiʻi ʻŌʻō
- Hawaiian coot
- Hawaiian duck
- Hawaiian Gallinule
- Hawaiian hawk
- Hawaiian honeycreeper
- Hawaiian honeycreeper conservation
- Hawaiian petrel
- Hawaiian rail
- Hawaiian stilt
- Hawfinch
- Hawk Mountain Sanctuary
- Hawkins's Rail
- Hay-Zama Lakes
- Hay Island (Queensland)
- Hay Island (Tasmania)
- Hayle Estuary
- Hazel Grouse
- Heard Island and McDonald Islands
- Heard Island Shag
- Heart-spotted Woodpecker
- Heath Hen
- Heathcote-Graytown National Park
- Heather Williams (biologist)
- Heavy-footed Moa
- Heermann's gull
- Helen Frances James
- Hellmayr's Pipit
- Helmet Vanga
- Helmeted Curassow
- Helmeted Guineafowl
- Helmeted Honeyeater
- Helmeted Hornbill
- Helmeted Manakin
- Helmeted Myna
- Hemignathus
- Hen and Chicken Islands
- Hen harrier
- Hen Island (Tasmania)
- Henderson Archaic Pigeon
- Henderson Ground Dove
- Henderson Imperial Pigeon
- Henderson Island (Pitcairn Islands)
- Henderson Islets
- Henna-tailed Jungle Flycatcher
- Henri's Snowfinch
- Henri Pittier National Park
- Henry Baker Tristram
- Henry Boardman Conover
- Henry Bryant (naturalist)
- Henry Doorly Zoo and Aquarium
- Henry Doubleday (1808–1875)
- Henry Eeles Dresser
- Henry Eliot Howard
- Henry Haversham Godwin-Austen
- Henry John Pearson
- Henry Kendall (ornithologist)
- Henry Lawrie Bell
- Henry Luke White
- Henry Maurice Drummond-Hay
- Henry Morris Upcher
- Henry Neville Southern
- Henry Ogg Forbes
- Henry Saxby
- Henry Seebohm
- Henry Wetherbee Henshaw
- Henry Wood Elliott
- Henslow's Sparrow
- Henst's Goshawk
- Hepatic Tanager
- Herbert Christopher Robinson
- Herbert Friedmann
- Herbert Girton Deignan
- Herbert Thomas Condon
- Hermansenøya Bird Sanctuary
- Hermit thrush
- Hermit Warbler
- Heron Island (Queensland)
- Hesperornis
- Hestur
- Heuglin's Francolin
- Heuglin's Gull
- Heuglin's Masked Weaver
- Heuglin's Wheatear
- Heywood Island (Antarctica)
- Hierofalcon
- Higginson Island
- High-billed crow
- Highland Elaenia
- Highland Finch
- Hildegarde Howard
- Hilgay Heronry
- Hill Blue Flycatcher
- Hill Partridge
- Hill pigeon
- Hill Prinia
- Hill Swallow
- Himalayan Beautiful Rosefinch
- Himalayan Black-lored Tit
- Himalayan Bluetail
- Himalayan bulbul
- Himalayan cuckoo
- Himalayan Cutia
- Himalayan Flameback
- Himalayan Monal
- Himalayan Quail
- Himalayan snowcock
- Himalayan Swiftlet
- Himalayan Vulture
- Himalayan White-browed Rosefinch
- Himalayan Woodpecker
- Hinasuri
- Hinde's Babbler
- Hippolyte Rocks
- Hispaniolan Amazon
- Hispaniolan Crossbill
- Hispaniolan Emerald
- Hispaniolan lizard cuckoo
- Hispaniolan Nightjar
- Hispaniolan Oriole
- Hispaniolan Parakeet
- Hispaniolan Spindalis
- Hispaniolan trogon
- Hispaniolan Woodpecker
- Hoary-headed Grebe
- Hoary-throated Barwing
- Hoatzin
- Hoazinavis
- Hobbs Island (Tasmania)
- Hobhouse Inlet
- Hodbarrow Nature Reserve
- Hodgens' Waterhen
- Hodgson's Frogmouth
- Hodgson's hawk-cuckoo
- Hodgson's Redstart
- Hoffmanns's Woodcreeper
- Holburn Lake and Moss
- Holleton Important Bird Area
- Hombron's Kingfisher
- Honduran Emerald
- Honeybird
- Honeycreeper
- Honeyguide Greenbul
- Hood Mockingbird
- Hooded Berryeater
- Hooded crane
- Hooded crow
- Hooded Dotterel
- Hooded Gnateater
- Hooded Grebe
- Hooded Grosbeak
- Hooded mannikin
- Hooded Oriole
- Hooded Parrot
- Hooded Pitohui
- Hooded Pitta
- Hooded Robin
- Hooded Seedeater
- Hooded Siskin
- Hooded Treepie
- Hooded Vulture
- Hooded Warbler
- Hooded Wheatear
- Hooded Yellowthroat
- Hoogerwerf's Pheasant
- Hook-billed Hermit
- Hook-billed kite
- Hook-billed Vanga
- Hoopoe
- Hoopoe-billed ʻAkialoa
- Hoopoe Starling
- Hope Bay
- Hope Harbour
- Hopen, Svalbard
- Horace Alexander
- Horace William Wheelwright
- Horned Coot
- Horned Curassow
- Horned grebe
- Horned Guan
- Horned Lark
- Horned Parakeet
- Horned Sungem
- Hornsea Mere
- Horsfield's bronze cuckoo
- Horsfield's Bush Lark
- Horton Plains National Park
- Horus Swift
- Hose's Broadbill
- Hose's Partridge
- Hoselaw Loch and Din Moss
- Hoskyn Islands
- Hottentot Teal
- Houbara Bustard
- House Bunting
- House crow
- House Finch
- House sparrow
- House Swift
- House Wren
- Houtman Abrolhos
- Howard Saunders
- Howth Head
- Hoy
- Huahine Cuckoo-Dove
- Huahine Gull
- Huahine Rail
- Huahine Starling
- Huahine Swamphen
- Huallaga Tanager
- Hubert Lynes
- Hubert Whittell
- Hubert Wilkins
- Huet's Fulvetta
- Hugh Alastair Ford
- Hugh Edwin Strickland
- Hugh Whistler
- Huia
- Hull River National Park
- Humaita Antbird
- Humble Island
- Humboldt Penguin
- Hume's Bush Warbler
- Hume's Hawk-Owl
- Hume's Leaf Warbler
- Hume's Owl
- Hume's Short-toed Lark
- Hume's Treecreeper
- Hume's Wheatear
- Hume's Whitethroat
- Hummingbird
- Hummock Island
- Hunstein's mannikin
- Hunter's Cisticola
- Hunter Estuary Wetlands
- Hunter Island (Tasmania)
- Hunter Island Group Important Bird Area
- Hunter Island Penguin
- Hunter Valley Important Bird Area
- Huntspill
- Huon Astrapia
- Huon Melidectes
- Huron-Manistee National Forests
- Hutovo Blato
- Hutton's Shearwater
- Hutton's Vireo
- Hyacinth Macaw
- Hyland Bay and Moyle Floodplain
- Hylocitrea
- Iaceornis
- Iago Sparrow
- Ian Appleyard
- Ian J. Mason
- Ian Newton
- Ian Rowley
- Ian Strange
- Ian Wallace (ornithologist)
- Ibadan Malimbe
- Iberomesornis
- Ibisbill
- Ic-Cnus to Tal-Bardan Cliffs Important Bird Area
- Icadyptes salasi
- Iceland gull
- Ichthyornis
- Icterine Greenbul
- Icterine Warbler
- Idle Valley Nature Reserve
- ʻIʻiwi
- Il-Kullana to ta' Gifen Cliffs Important Bird Area
- Ilbandornis
- Ildefonso Islands
- Île aux Cochons
- Île de l'Est
- Île de la Possession
- Île des Pingouins
- Ile du Golfe
- Île du Lys
- Île Foch
- Île Howe
- Ile Longue (Peros Banhos)
- Ile Parasol
- Île Saint-Lanne Gramont
- Île Saint-Paul
- Ilerdopteryx
- Îles Leygues
- Îles Nuageuses
- Ilhéu Branco
- Ilhéu de Curral Velho and adjacent coast Important Bird Area
- Ilhéu Raso
- Ilhéus Secos
- Illinois Ornithological Society
- Îlots des Apôtres
- Imeri Warbling Antbird
- Imperial Amazon
- Imperial Pheasant
- Imperial Shag
- Imperial Woodpecker
- Important Bird Area
- Inaccessible Island
- Inaccessible Islands
- Inca dove
- Inca Flycatcher
- Inca jay
- Inca Tern
- Inca Wren
- Indawgyi Lake
- Indian Black-lored Tit
- Indian blackbird
- Indian Blue Robin
- Indian Bush Lark
- Indian Cormorant
- Indian Courser
- Indian cuckoo
- Indian eagle-owl
- Indian Grassbird
- Indian Grey Hornbill
- Indian Nightjar
- Indian Nuthatch
- Indian peafowl
- Indian Pitta
- Indian pond heron
- Indian Robin
- Indian Roller
- Indian Scimitar Babbler
- Indian scops owl
- Indian silverbill
- Indian Skimmer
- Indian Spotted Creeper
- Indian Spotted Eagle
- Indian Stone-curlew
- Indian Swiftlet
- Indian Vulture
- Indigo-banded Kingfisher
- Indigo-capped Hummingbird
- Indigo bunting
- Indigo Flowerpiercer
- Indigo Macaw
- Indochinese Green Magpie
- Indonesian Honeyeater
- Ingeborgfjellet
- Inishmurray
- Inishtrahull Island
- Inkayacu
- Inland Dotterel
- Inland Thornbill
- Inner Little Goose Island
- Innes National Park
- Insh Marshes
- Intermediate egret
- Intermountain West Joint Venture
- International Crane Foundation
- International Migratory Bird Day
- Inversnaid
- Investigator Group
- Invisible rail
- Iolo Williams
- Iora
- Iphis Monarch
- Iquitos Gnatcatcher
- Ira Lalaro
- Ira Noel Gabrielson
- Irabere estuary and Iliomar forest Important Bird Area
- Iraq Babbler
- Ireland's Eye
- Iringa Akalat
- Iris Lorikeet
- Isabel Bassett Wasson
- Isabela Oriole
- Isabella Island
- Isabelline Bush-hen
- Isabelline Shrike
- Isabelline Wheatear
- Ishkashim Important Bird Area
- Iskanderkul
- Isla Aves
- Isla de Flores
- Isla de las Gaviotas, Montevideo
- Isla de Lobos
- Island Scrub Jay
- Island thrush
- Island Whistler
- Islands North of Port Stewart Important Bird Area
- Isles of Scilly
- Islet off NE Groote Eylandt Important Bird Area
- Isøyane Bird Sanctuary
- Italian Sparrow
- Itatiaia Spinetail
- Ituri Batis
- Ivan Carnaby
- Ivory-backed Woodswallow
- Ivory-billed Woodpecker
- Ivory-breasted Pitta
- Ivory gull
- Iwo Jima Rail
- Izu thrush
- J. Denis Summers-Smith
- J. Dewey Soper
- J. K. Stanford
- J. Lewis Bonhote
- J. Michael Scott
- Ja River Scrub Warbler
- Jabiru
- Jack Hyett
- Jack snipe
- Jack Vincent
- Jackal Buzzard
- Jackson's Pipit
- Jackson's Widowbird
- Jackson Bottom Wetlands Preserve
- Jackson Head to Stafford River Important Bird Area
- Jackson Miles Abbott
- Jacky Winter
- Jaco Island
- Jacob Henry Studer
- Jacobin cuckoo
- Jacquemart Island
- Jalbarragup Important Bird Area
- Jamaican Becard
- Jamaican blackbird
- Jamaican Caracara
- Jamaican crow
- Jamaican Elaenia
- Jamaican Ibis
- Jamaican lizard cuckoo
- Jamaican Mango
- Jamaican Oriole
- Jamaican Owl
- Jamaican Petrel
- Jamaican Pewee
- Jamaican Poorwill
- Jamaican red macaw
- Jamaican Spindalis
- Jamaican Tody
- Jamaican Vireo
- Jamaican Wood Rail
- Jamaican Woodpecker
- Jambandu Indigobird
- Jambu Fruit Dove
- James's flamingo
- James Allen Keast
- James Bell Pettigrew
- James Bolton
- James Bond (ornithologist)
- James Chapin
- James Clements
- James Edmund Harting
- James Eike
- James Ferguson-Lees
- James Fisher (naturalist)
- James Francis Stephens
- James Franklin (naturalist)
- James Greenway
- James Henry Fleming
- James Hepburn (ornithologist)
- James Lee Peters
- James Macdonald (ornithologist)
- James Parsons Burkitt
- James Roy Kinghorn
- James William Abert
- Jameson's Antpecker
- Jameson's Firefinch
- Jameson's Wattle-eye
- Jameson Point
- Jan Mayen
- Jandaya Parakeet
- Janet Kear
- Jankowski's Bunting
- Japanese Accentor
- Japanese Bush Warbler
- Japanese Cormorant
- Japanese Green Woodpecker
- Japanese Grosbeak
- Japanese murrelet
- Japanese night heron
- Japanese Paradise Flycatcher
- Japanese quail
- Japanese Reed Bunting
- Japanese Robin
- Japanese scops owl
- Japanese Skylark
- Japanese Sparrowhawk
- Japanese thrush
- Japanese Tit
- Japanese Wagtail
- Japanese waxwing
- Japanese White-eye
- Japanese wood pigeon
- Japoon National Park
- Jason Islands
- Java sparrow
- Javan cochoa
- Javan Flameback
- Javan Fulvetta
- Javan hawk-eagle
- Javan Kingfisher
- Javan Lapwing
- Javan munia
- Javan Myna
- Javan Owlet
- Javan Plover
- Javan pond heron
- Javan scops owl
- Javan Sunbird
- Javan Trogon
- Javan Whistling Thrush
- Jayamangali Blackbuck Reserve
- Jean Théodore Delacour
- Jeffery Boswall
- Jelski's Chat-Tyrant
- Jemima Blackburn
- Jemima Parry-Jones
- Jenny Lind Island
- Jerdon's Babbler
- Jerdon's Baza
- Jerdon's Bush Chat
- Jerdon's Bush Lark
- Jerdon's Courser
- Jerdon's Leafbird
- Jerdon's Nightjar
- Jeremy Greenwood
- Jervis Bay
- Jessie Maye Smith
- Jim Flegg
- Jiro Kikkawa
- Joan Paton
- Jobi Manucode
- Jock Marshall
- Jocotoco Antpitta
- Joel Asaph Allen
- Johanna's Sunbird
- John Abbot (entomologist)
- John Albert Leach
- John B. Cox
- John Barrett (conservationist)
- John Biddulph
- John Burton Cleland
- John Buxton (ornithologist)
- John C. Anderton
- John Cassin
- John Coney Moulton
- John Cotton (ornithologist)
- John Danzenbaker
- John Disney (ornithologist)
- John Douglas Gibson
- John Edgar Courtney
- John Edward Gray
- John Frederick Miller
- John Freeman Milward Dovaston
- John Gooders
- John Gould
- John Graham Bell
- John Guille Millais
- John Hancock (ornithologist)
- John Henry Gurney Jr.
- John Henry Gurney Sr.
- John Henry Vaughan
- John Hobbs (ornithologist)
- John James Audubon
- John Kenneth Terres
- John Kirk Townsend
- John Latham (ornithologist)
- John Legg (ornithologist)
- John Lewis Childs
- John Livsey Ridgway
- John McClelland (doctor)
- John McKean (ornithologist)
- John Michael Cullen
- John Morton Boyd
- John Neil McGilp
- John Richardson (naturalist)
- John Thayer (ornithologist)
- John Todd Zimmer
- John Treadwell Nichols
- John W. Fitzpatrick
- John Warham
- John Warren Aldrich
- John Whitehead (explorer)
- John Wiens
- John Woinarski
- John Yealland
- John Young (cinematographer)
- Johnston Atoll
- Jon Edward Ahlquist
- Jonathan Dwight
- Jonathan Elphick
- Jonquil Parrot
- Jos Plateau Indigobird
- Joseph Beal Steere
- Joseph Forshaw
- Joseph H. Acklen
- Joseph Harvey Riley
- Joseph Whitaker (ornithologist)
- Josephine's Lorikeet
- Jouanin's petrel
- Joubin Islands
- Jourdain Society
- Juan de Nova Island
- Juan Fernández Firecrown
- Juan Fernández Tit-Tyrant
- Juan Gundlach
- Juan Lembeye
- Juba Game Reserve
- Judbarra / Gregory National Park
- Judinornis
- Judith Toups
- Julian Ralph Ford
- Juncal Island
- Juneau Raptor Center
- Jungle Babbler
- Jungle Bush Quail
- Jungle crow
- Jungle Myna
- Jungle Nightjar
- Jungle Owlet
- Jungle Prinia
- Junín Canastero
- Junin Crake
- Junin Grebe
- Junin Tapaculo
- Juniper Titmouse
- Kabobo Apalis
- Kadalundi Bird Sanctuary
- Kadavu Fantail
- Kadavu Honeyeater
- Kaempfer's Tody-Tyrant
- Kaempfer's Woodpecker
- Kaggaladu Bird Sanctuary
- Kagu
- Kai Cicadabird
- Kai coucal
- Kaiika
- Kairuku
- Kairuku grebneffi
- Kakadu National Park
- Kakapo
- Kākāriki
- Kākāwahie
- Kalamunda National Park
- Kalij pheasant
- Kalinowski's Chat-Tyrant
- Kalkadoon Grasswren
- Kalsoy
- Kāmaʻo
- Kanaha Pond State Wildlife Sanctuary
- Kanaka Pigeon
- Kangaroo Island
- Kangryong Field
- Kanjirankulam Bird Sanctuary
- Kanowna Island
- Kapp Linné Bird Sanctuary
- Karakul (Tajikistan)
- Karamoja Apalis
- Karara and Lochada Important Bird Area
- Karoo Chat
- Karoo Lark
- Karoo Prinia
- Karoo Scrub Robin
- Karoo thrush
- Karroun Hill Nature Reserve
- Karthala White-eye
- Kartsakhi Lake
- Kashmir Flycatcher
- Kashmir nuthatch
- Kate Humble
- Kate Vincent
- Kathleen Island
- Kattasay and Daganasay Reservoirs Important Bird Area
- Kaua'i mole duck
- Kauaʻi ‘Elepaio
- Kauaʻi ʻAkialoa
- Kauaʻi ʻAmakihi
- Kauaʻi Finch
- Kauaʻi Nukupuʻu
- Kauaʻi ʻŌʻō
- Kauai Palila
- Kaudulla National Park
- Kawall's Amazon
- Kayrakkum Reservoir
- Kaziranga National Park
- Kea
- Kealia Pond National Wildlife Refuge
- Keel-billed Motmot
- Keel-billed Toucan
- Keep River Important Bird Area
- Keep River National Park
- Keith Alfred Hindwood
- Keith Vinicombe
- Kelbra Dam
- Kelenken
- Kellick Island
- Kelp Goose
- Kelp gull
- Kemp's Longbill
- Ken Simmons
- Kendall Island Migratory Bird Sanctuary
- Kenn Kaufman
- Kenneth Williamson
- Kentish plover
- Kentucky Warbler
- Kenya Sparrow
- Keoladeo National Park
- Keppel Island
- Kerala Laughingthrush
- Kerguelen Petrel
- Kermadec Islands
- Kermadec petrel
- Kermadec Red-crowned Parakeet
- Kern River Preserve
- Kessler's Thrush
- Key West Quail-Dove
- Khaki Campbell
- Khaparwas Wildlife Sanctuary
- Khijadiya Bird Sanctuary
- Khosrov State Reserve
- Kibale National Park
- Kidepo Game Reserve
- Kidepo Valley National Park
- Kidney Island
- Killdeer
- Kilombero Weaver
- Kimberley Honeyeater
- Kimberley Pipit
- King's Sedgemoor
- King's Sedgemoor Drain
- King (pigeon)
- King Bird-of-paradise
- King eider
- King Island (Tasmania)
- King Kong Grosbeak
- King of Holland's Bird of Paradise
- King of Saxony Bird-of-paradise
- King Penguin
- King Quail
- King rail
- King vulture
- Kinglet Calyptura
- Kioea
- Kirtland's Warbler
- Kittiwake
- Kittlitz's Plover
- Kivu ground thrush
- Kızılırmak Delta
- Klaas's cuckoo
- Klages's Antbird
- Klages's Antwren
- Knob-billed Duck
- Knob-billed Fruit Dove
- Knobbed Hornbill
- Knysna turaco
- Knysna Warbler
- Knysna Woodpecker
- Koepcke's Hermit
- Kofiau Monarch
- Kōkako
- Koklass Pheasant
- Kolombangara Monarch
- Kolombangara White-eye
- Koltur
- Kona Grosbeak
- Kondara Gorge
- Kongsfjorden Bird Sanctuary
- Konstantin Halafoff
- Koobabbie Important Bird Area
- Kookaburra
- Koothankulam Bird Sanctuary
- Kordofan Sparrow
- Korean magpie
- Koreelah National Park
- Kori Bustard
- Kosrae Starling
- Kowhai Valley and Shearwater Stream Important Bird Area
- Kozlov's Accentor
- Krüper's nuthatch
- Kuhl's Lorikeet
- Kulikalon Lakes
- Kullaberg
- Kumarakom Bird Sanctuary
- Kumlien's Gull
- Kumya Bay Important Bird Area
- Kunoy
- Kurdish Wheatear
- Kure Atoll
- Kurrartapu
- Kurrichane thrush
- Kurrimine Beach National Park
- Kutch Bustard Sanctuary
- Kutini-Payamu (Iron Range) National Park
- Kuwolsan
- Kwobrup-Badgebup Important Bird Area
- L'Esperance Rock
- L. Austin Jr Oliver
- La Digue
- La Palma chaffinch
- La Selle thrush
- Labrador duck
- Lac Deschênes
- Laced Woodpecker
- Lacepede Islands
- Ladder-backed Woodpecker
- Ladder-tailed Nightjar
- Lady Amherst's Pheasant
- Lady Musgrave Island
- Laevisoolithus
- Lafresnaye's Vanga
- Lafresnaye's Woodcreeper
- Laggar Falcon
- Lågskär
- Laguna de la Restinga
- Lake Albert (South Australia)
- Lake Alexandrina (South Australia)
- Lake Argyle
- Lake Ballard
- Lake Barlee
- Lake Bathurst (New South Wales)
- Lake Be Malae
- Lake Beeac
- Lake Bindegolly National Park
- Lake Bisina
- Lake Blanche
- Lake Borrie Wetlands
- Lake Bujon National Park
- Lake Callabonna
- Lake Connewarre
- Lake Connewarre State Wildlife Reserve
- Lake Corangamite
- Lake Duck
- Lake Erie Metropark
- Lake Eyre
- Lake Galilee (Queensland)
- Lake Gore
- Lake Gregory (South Australia)
- Lake Gregory (Western Australia)
- Lake Hawdon System Important Bird Area
- Lake Joondalup
- Lake Kompienga
- Lake Kundi
- Lake Kununurra
- Lake Kwangpo
- Lake Machattie Area
- Lake Macleod
- Lake Macquarie (New South Wales)
- Lake Magenta Nature Reserve
- Lake Manpo and Lake Bonpo Important Bird Area
- Lake Mburo National Park
- Lake McLarty Nature Reserve
- Lake Muir
- Lake Munmorah
- Lake Newland Conservation Park
- Lake Nokoué
- Lake Opeta
- Lake Pleasant View System Important Bird Area
- Lake Rangrim
- Lake Samilpo
- Lake Sylvester System
- Lake Torrens National Park
- Lake Tungjong and Lake Chonapo Important Bird Area
- Lake Victoria (Victoria)
- Lake Vyrnwy
- Lake Warden (Western Australia)
- Lake Wollumboola
- Lake Woods
- Lake Yamma Yamma
- Lake Žuvintas
- Lakenheath Fen RSPB reserve
- Lakes Muncoonie, Mumbleberry and Torquinie Important Bird Area
- Lakh Bahosi Sanctuary
- Lamington National Park
- Lana'i 'Alauahio
- Lāna'i Hookbill
- Lance-tailed Manakin
- Lanceolated Monklet
- Lanceolated Warbler
- Landana Firefinch
- Langport
- Langstone Harbour
- Lanner Falcon
- Lapland longspur
- Lappet-faced Vulture
- Large-billed Lark
- Large-billed Leaf Warbler
- Large-billed Reed Warbler
- Large-billed Scrubwren
- Large-footed Tapaculo
- Large-tailed Nightjar
- Large Blue Flycatcher
- Large Cactus Finch
- Large Cuckooshrike
- Large Green Pigeon
- Large Grey Babbler
- Large Ground Finch
- Large hawk-cuckoo
- Large Lifou white-eye
- Large Niltava
- Large Scimitar Babbler
- Large Tree Finch
- Large Woodshrike
- Lark Bunting
- Lark Sparrow
- Larne Lough
- Larry Martin
- Larsen Islands
- Latham's Francolin
- Latham's snipe
- Laughing Dove
- Laughing Falcon
- Laughing gull
- Laughing Kookaburra
- Laughing owl
- Laura Boulton
- Laurel pigeon
- Laurence Edmondston
- Laurence Markham Huey
- Lava Gull
- Lava heron
- Lava Shearwater
- Lavender Waxbill
- Lavocatavis
- Lawes's Parotia
- Lawrence's Goldfinch
- Lawrence's thrush
- Lawrence Courtney Haines
- Lawrence H. Walkinshaw
- Lawrence Rocks
- Layard's Parakeet
- Laysan duck
- Laysan Finch
- Laysan Honeycreeper
- Laysan Millerbird
- Laysan rail
- Lazuli Bunting
- Lazuli Kingfisher
- Lazy Cisticola
- Le Conte's Sparrow
- Le Conte's Thrasher
- Leach's storm petrel
- Leaf Lorikeet
- Leafbird
- Lear's Macaw
- Least auklet
- Least bittern
- Least Flycatcher
- Least grebe
- Least Honeyguide
- Least Poorwill
- Least sandpiper
- Least storm petrel
- Least tern
- Legge's Flowerpecker
- Legge's Hawk-Eagle
- Legune (Joseph Bonaparte Bay) Important Bird Area
- Leighton Moss RSPB reserve
- Leipoa
- Lemon-bellied Crombec
- Lemon-bellied White-eye
- Lemon-rumped Warbler
- Lemon-throated Barbet
- Lemon dove
- Len Howard
- Lengteng Wildlife Sanctuary
- Leon Jacob Cole
- Leonard Cutler Sanford
- Leonhard Hess Stejneger
- Lesley Brooker
- Leslie Christidis
- Leslie Gordon Chandler
- Leslie Hilton Brown
- Leslie Street Spit
- Lesser Adjutant
- Lesser ʻAkialoa
- Lesser Antillean Bullfinch
- Lesser Antillean macaw
- Lesser Antillean Pewee
- Lesser Antillean Tanager
- Lesser Bird-of-paradise
- Lesser black-backed gull
- Lesser Blue-eared Starling
- Lesser coucal
- Lesser Crested Tern
- Lesser cuckoo
- Lesser Elaenia
- Lesser Fish Eagle
- Lesser flamingo
- Lesser Florican
- Lesser frigatebird
- Lesser Golden Plover
- Lesser Goldfinch
- Lesser Green Leafbird
- Lesser Grey Shrike
- Lesser ground cuckoo
- Lesser Ground Robin
- Lesser Honeyguide
- Lesser Hoopoe-Lark
- Lesser Horned Owl
- Lesser Jacana
- Lesser Kestrel
- Lesser Kiskadee
- Lesser Koa Finch
- Lesser Melampitta
- Lesser Moorhen
- Lesser Necklaced Laughingthrush
- Lesser Nighthawk
- Lesser Noddy
- Lesser prairie chicken
- Lesser racket-tailed drongo
- Lesser Redpoll
- Lesser roadrunner
- Lesser sand plover
- Lesser scaup
- Lesser Seedcracker
- Lesser Short-toed Lark
- Lesser Shortwing
- Lesser Shrike-Tyrant
- Lesser Sooty Owl
- Lesser Spotted Eagle
- Lesser Spotted Woodpecker
- Lesser Striped Swallow
- Lesser Swallow-tailed Swift
- Lesser Swamp Warbler
- Lesser Vasa Parrot
- Lesser white-fronted goose
- Lesser Whitethroat
- Lesser Woodcreeper
- Lesser yellow-headed vulture
- Lesser yellowlegs
- Lesser Yellownape
- Lester L. Short
- Letter-winged Kite
- Levaillant's Cisticola
- Levaillant's cuckoo
- Levant Sparrowhawk
- Lewin's Honeyeater
- Lewin's Rail
- Lewis's Woodpecker
- Liaoningornis
- Liaoxiornis
- Liberian Greenbul
- Lichtenstein's sandgrouse
- Lidth's Jay
- Liebes
- Liebitz
- Light-mantled albatross
- Light-vented Bulbul
- Lilac-breasted Roller
- Lilac-crowned Amazon
- Lilac-crowned Fruit Dove
- Lilac Kingfisher
- Lilian's Lovebird
- Lilyvale Important Bird Area
- Lime Island State Recreation Area
- Limeburners Bay
- Limestone Islands
- Limmen Bight
- Limnofregata
- Limpinwood Nature Reserve
- Limpkin
- Lina's Sunbird
- Lincoln's Sparrow
- Lincolnshire Gate
- Lindsay Smith (ornithologist)
- Lineated Barbet
- Lined Forest Falcon
- Linnaean Society of New York
- Lions Rump
- Liptornis
- List of adaptive radiated Hawaiian honeycreepers by form
- List of African birds
- List of albatross breeding locations
- List of Asian birds
- List of Australian bird emblems
- List of bird species introduced to the Hawaiian Islands
- List of birds in Jinja
- List of birds in Mont-Tremblant National Park
- List of birds of Afghanistan
- List of birds of Alaska
- List of birds of Albania
- List of birds of Alberta
- List of birds of Aleutian Islands
- List of birds of Algeria
- List of birds of American Samoa
- List of birds of Andhra Pradesh
- List of birds of Andorra
- List of birds of Angola
- List of birds of Anguilla
- List of birds of Antarctica
- List of birds of Antigua and Barbuda
- List of birds of Argentina
- List of birds of Arizona
- List of birds of Armenia
- List of birds of Australia
- List of birds of Australia, New Zealand and Antarctica
- List of birds of Austria
- List of birds of Azerbaijan
- List of birds of Azibo Reservoir Protected Landscape
- List of birds of Bahrain
- List of birds of Bangalore
- List of birds of Bangladesh
- List of birds of Barbados
- List of birds of Belarus
- List of birds of Belgium
- List of birds of Belize
- List of birds of Benin
- List of birds of Bermuda
- List of birds of Bhutan
- List of birds of Bolivia
- List of birds of Bosnia and Herzegovina
- List of birds of Botswana
- List of birds of Brazil
- List of birds of Brunei
- List of birds of Bulgaria
- List of birds of Burkina Faso
- List of birds of Burma
- List of birds of Burundi
- List of birds of California
- List of birds of Cambodia
- List of birds of Cameroon
- List of birds of Canada
- List of birds of Canada and the United States
- List of birds of Cape Verde
- List of birds of Chad
- List of birds of Chennai
- List of birds of Chile
- List of birds of China
- List of birds of Christmas Island
- List of birds of Colombia
- List of birds of Colorado
- List of birds of Comoros
- List of birds of Connecticut
- List of birds of Costa Rica
- List of birds of Croatia
- List of birds of Cuba
- List of birds of Cyprus
- List of birds of Denmark
- List of birds of Djibouti
- List of birds of Dominica
- List of birds of Easter Island
- List of birds of Ecuador
- List of birds of Egypt
- List of birds of El Salvador
- List of birds of Equatorial Guinea
- List of birds of Eritrea
- List of birds of Estonia
- List of birds of Ethiopia
- List of birds of Fiji
- List of birds of Finland
- List of birds of Florida
- List of birds of French Guiana
- List of birds of French Polynesia
- List of birds of Gabon
- List of birds of Georgia (country)
- List of birds of Georgia (U.S. state)
- List of birds of Germany
- List of birds of Ghana
- List of birds of Gibraltar
- List of birds of Glacier National Park (U.S.)
- List of birds of Goa
- List of birds of Great Britain
- List of birds of Greece
- List of birds of Greenland
- List of birds of Grenada
- List of birds of Guam
- List of birds of Guatemala
- List of birds of Guinea
- List of birds of Guinea-Bissau
- List of birds of Guyana
- List of birds of Haiti
- List of birds of Hawaii
- List of birds of Heard and McDonald Islands
- List of birds of Hispaniola
- List of birds of Honduras
- List of birds of Hong Kong
- List of birds of Hungary
- List of birds of Iceland
- List of birds of Idaho
- List of birds of Illinois
- List of birds of India
- List of birds of Indiana
- List of birds of Indonesia
- List of birds of Iowa
- List of birds of Iran
- List of birds of Iraq
- List of birds of Ireland
- List of birds of Islamabad
- List of birds of Israel
- List of birds of Italy
- List of birds of Ivory Coast
- List of birds of Jamaica
- List of birds of Japan
- List of birds of Jordan
- List of birds of Kangaroo Island, South Australia
- List of birds of Kansas
- List of birds of Karnataka
- List of birds of Kazakhstan
- List of birds of Kenya
- List of birds of Kerala
- List of birds of King Island (Tasmania)
- List of birds of Kiribati
- List of birds of Korea
- List of birds of Kuwait
- List of birds of Kyrgyzstan
- List of birds of Laos
- List of birds of Latvia
- List of birds of Lebanon
- List of birds of Leicestershire and Rutland
- List of birds of Lesotho
- List of birds of Liberia
- List of birds of Libya
- List of birds of Liechtenstein
- List of birds of Lithuania
- List of birds of Luxembourg
- List of birds of Macau
- List of birds of Madagascar
- List of birds of Madeira
- List of birds of Maine
- List of birds of Malawi
- List of birds of Malaysia
- List of birds of Mali
- List of birds of Malta
- List of birds of Maryland
- List of birds of Massachusetts
- List of birds of Mauritania
- List of birds of Mauritius
- List of birds of Metropolitan France
- List of birds of Mexico
- List of birds of Michigan
- List of birds of Micronesia
- List of birds of Minnesota
- List of birds of Missouri
- List of birds of Moldova
- List of birds of Monaco
- List of birds of Mongolia
- List of birds of Montana
- List of birds of Montenegro
- List of birds of Montserrat
- List of birds of Morocco
- List of birds of Mozambique
- List of birds of Namibia
- List of birds of Nauru
- List of birds of Nebraska
- List of birds of Nepal
- List of birds of Nevada
- List of birds of New Caledonia
- List of birds of New Jersey
- List of birds of New Mexico
- List of birds of New York
- List of birds of New Zealand
- List of birds of Nicaragua
- List of birds of Niger
- List of birds of Nigeria
- List of birds of Niue
- List of birds of North Carolina
- List of birds of North Dakota
- List of birds of North Korea
- List of birds of Norway
- List of birds of Nunavut
- List of birds of Ohio
- List of birds of Oklahoma
- List of birds of Oman
- List of birds of Ontario
- List of birds of Oregon
- List of birds of Pakistan
- List of birds of Palau
- List of birds of Palestine
- List of birds of Panama
- List of birds of Papua New Guinea
- List of birds of Paraguay
- List of birds of Pennsylvania
- List of birds of Peru
- List of birds of Poland
- List of birds of Portugal
- List of birds of Puerto Rico
- List of birds of Qatar
- List of birds of Queensland
- List of birds of Réunion
- List of birds of Romania
- List of birds of Russia
- List of birds of Rwanda
- List of birds of Saint Helena
- List of birds of Saint Kitts and Nevis
- List of birds of Saint Lucia
- List of birds of Saint Vincent and the Grenadines
- List of birds of Samoa
- List of birds of San Marino
- List of birds of Santa Cruz County, California
- List of birds of São Tomé and Príncipe
- List of birds of Saudi Arabia
- List of birds of Senegal
- List of birds of Serbia
- List of birds of Seychelles
- List of birds of Sierra Leone
- List of birds of Singanallur Lake
- List of birds of Singapore
- List of birds of Slovakia
- List of birds of Slovenia
- List of birds of Somalia
- List of birds of South Africa
- List of birds of South Asia
- List of birds of South Asia: part 1
- List of birds of South Asia: part 2
- List of birds of South Asia: part 3
- List of birds of South Asia: part 4
- List of birds of South Australia
- List of birds of South Carolina
- List of birds of South Dakota
- List of birds of South India
- List of birds of South Korea
- List of birds of South Texas
- List of birds of Spain
- List of birds of Sri Lanka
- List of birds of Sudan
- List of birds of Suriname
- List of birds of Swaziland
- List of birds of Sweden
- List of birds of Switzerland
- List of birds of Syria
- List of birds of Taiwan
- List of birds of Tajikistan
- List of birds of Tamil Nadu
- List of birds of Tanzania
- List of birds of Tasmania
- List of birds of Texas
- List of birds of Thailand
- List of birds of the Bahamas
- List of birds of the British Virgin Islands
- List of birds of the Cayman Islands
- List of birds of the Central African Republic
- List of birds of the Cook Islands
- List of birds of the Czech Republic
- List of birds of the Democratic Republic of the Congo
- List of birds of the Dominican Republic
- List of birds of the Faroe Islands
- List of birds of the Gambia
- List of birds of the Houtman Abrolhos
- List of birds of the Isle of Man
- List of birds of the Klamath Basin
- List of birds of the Madrean Sky Islands
- List of birds of the Maldives
- List of birds of the Marshall Islands
- List of birds of the Netherlands
- List of birds of the Netherlands Antilles
- List of birds of the Northern Mariana Islands
- List of birds of the Philippines
- List of birds of the Pitcairn Islands
- List of birds of the Republic of Macedonia
- List of birds of the Sierra Madre Occidental
- List of birds of the Sierra Madre Oriental
- List of birds of the Solomon Islands
- List of birds of the Sonoran Desert
- List of birds of the Turks and Caicos Islands
- List of birds of the U.S. Virgin Islands
- List of birds of the United Arab Emirates
- List of birds of the United States
- List of birds of the Virgin Islands
- List of birds of Togo
- List of birds of Tokelau
- List of birds of Tonga
- List of birds of Trinidad and Tobago
- List of birds of Tunisia
- List of birds of Turkey
- List of birds of Turkmenistan
- List of birds of Tuvalu
- List of birds of Uganda
- List of birds of Ukraine
- List of birds of Uruguay
- List of birds of Utah
- List of birds of Uzbekistan
- List of birds of Vanuatu
- List of birds of Venezuela
- List of birds of Vermont
- List of birds of Vieques
- List of birds of Vietnam
- List of birds of Wales
- List of birds of Wallis and Futuna
- List of birds of Washington
- List of birds of West Virginia
- List of birds of Western Australia
- List of birds of Western Sahara
- List of birds of Wisconsin
- List of birds of Wyoming
- List of birds of Yellowstone National Park
- List of birds of Yemen
- List of birds of Yuma County, Arizona
- List of birds of Yuma, Arizona
- List of birds of Zambia
- List of birds of Zimbabwe
- List of birds on stamps of Abu Dhabi
- List of birds on stamps of Afghanistan
- List of birds on stamps of Aitutaki
- List of birds on stamps of Ajman
- List of birds on stamps of Åland
- List of birds on stamps of Albania
- List of birds on stamps of Algeria
- List of birds on stamps of Andorra
- List of birds on stamps of Angola
- List of birds on stamps of Armenia
- List of birds on stamps of Aruba
- List of birds on stamps of Austria
- List of birds on stamps of Azerbaijan
- List of birds on stamps of Azores
- List of birds on stamps of Bechuanaland
- List of birds on stamps of Belgian Congo
- List of birds on stamps of Bequia
- List of birds on stamps of Bermuda
- List of birds on stamps of Bhutan
- List of birds on stamps of Biafra
- List of birds on stamps of Bophuthatswana
- List of birds on stamps of British Guiana
- List of birds on stamps of Burma
- List of birds on stamps of Cambodia
- List of birds on stamps of Cape Juby
- List of birds on stamps of Cape Verde
- List of birds on stamps of Croatia
- List of birds on stamps of Estonia
- List of birds on stamps of Fernando Po
- List of birds on stamps of Finland
- List of birds on stamps of Guinea-Bissau
- List of birds on stamps of Ifni
- List of birds on stamps of India
- List of birds on stamps of Italian East Africa
- List of birds on stamps of Italian Somalia
- List of birds on stamps of Jaipur
- List of birds on stamps of Japan
- List of birds on stamps of Latvia
- List of birds on stamps of Macau
- List of birds on stamps of Madeira
- List of birds on stamps of Malta
- List of birds on stamps of Manchukuo
- List of birds on stamps of Mozambique
- List of birds on stamps of Pakistan
- List of birds on stamps of Portugal
- List of birds on stamps of Rio Muni
- List of birds on stamps of Sao Tome e Principe
- List of birds on stamps of Spanish Sahara
- List of birds on stamps of the Australian Antarctic Territory
- List of birds on stamps of the British Indian Ocean Territory
- List of birds on stamps of West Irian
- List of birds on stamps of Zimbabwe
- List of endemic bird areas of the world
- List of endemic birds of Australia
- List of endemic birds of Borneo
- List of endemic birds of Sri Lanka
- List of endemic birds of Taiwan
- List of endemic birds of the Philippines
- List of Eurasian nuthatch subspecies
- List of European birds
- List of extinct and endangered species of Italy
- List of Gauteng birds
- List of Important Bird Areas in Michigan
- List of Important Bird Areas in the United Kingdom
- List of Indian state birds
- List of kakapo
- List of locations in the Somerset Levels
- List of Migratory Bird Sanctuaries of Canada
- List of national birds
- List of non-native birds of Great Britain
- List of non-passerine Indonesian birds
- List of non-passerine Japanese birds
- List of North American birds
- List of North American birds (Accipitriformes)
- List of North American birds (Anseriformes)
- List of North American birds (Apodiformes)
- List of North American birds (Caprimulgiformes)
- List of North American birds (Charadriiformes)
- List of North American birds (Columbiformes)
- List of North American birds (Coraciiformes)
- List of North American birds (Cuculiformes)
- List of North American birds (Falconiformes)
- List of North American birds (Galliiformes)
- List of North American birds (Gruiformes)
- List of North American birds (Other Orders)
- List of North American birds (Passeriformes)
- List of North American birds (Pelicaniformes)
- List of North American birds (Piciiformes)
- List of North American birds (Procellariiformes)
- List of North American birds (Psittaciformes)
- List of North American birds (Strigiformes)
- List of North American birds (Suliformes)
- List of North American birds (Tinamiformes)
- List of North American hummingbirds
- List of passerine Indonesian birds
- List of passerine Japanese birds
- List of RSPB reserves
- List of secondary endemic bird areas of the world
- List of Southern African birds
- List of Special Protection Areas in Scotland
- List of Special Protection Areas in the United Kingdom
- List of state ornithological organizations in the United States
- List of threatened birds of the United States
- List of Tinamidae
- List of Tuamotu birds
- List of U.S. county birds
- List of U.S. state birds
- List of United Kingdom bird clubs and ornithological societies
- Lists of birds by region
- Lists of endemic birds
- Litchfield Island
- Lithornis
- Lithornithidae
- Lítla Dímun
- Little Anderson Island
- Little auk
- Little Badger Island
- Little Barrier Island
- Little Bee-eater
- Little bittern
- Little Black Cormorant
- Little blue heron
- Little Bunting
- Little Bustard
- Little Buttonquail
- Little Chachalaca
- Little Chalky Island
- Little Corella
- Little Cormorant
- Little Crake
- Little Crow (bird)
- Little cuckoo
- Little curlew
- Little Desert National Park
- Little Dog Island
- Little Eagle
- Little egret
- Little Forktail
- Little Friarbird
- Little Goose Island
- Little Grassbird
- Little Grebe
- Little Green Island
- Little Green Pigeon
- Little Green Sunbird
- Little Greenbul
- Little Grey Flycatcher
- Little Grey Greenbul
- Little Grey Woodpecker
- Little Ground Tyrant
- Little gull
- Little Hermit
- Little Inca Finch
- Little Lorikeet
- Little Minivet
- Little owl
- Little Penguin
- Little Pied Cormorant
- Little Pied Flycatcher
- Little raven
- Little Ringed plover
- Little rush warbler
- Little Shearwater
- Little Skellig
- Little Slaty Flycatcher
- Little Sparrowhawk
- Little Spiderhunter
- Little stint
- Little Sumba Hawk-Owl
- Little Swift
- Little Tern
- Little Trefoil Island
- Little Waterhouse Island
- Little Wattlebird
- Little Weaver
- Little Wood Rail
- Little Woodpecker
- Little Woodswallow
- Littoral Rock Thrush
- Lively Island
- Livingstone National Park
- Lizard Buzzard
- Lobéké National Park
- Loch Fleet
- Loch Garten
- Loch Gruinart
- Loch of Skene
- Loch of Strathbeg
- Loch Ruthven
- Lochnagar
- Lochs of Spiggie and Brow
- Lochwinnoch
- Lockerbie Scrub
- Locust Finch
- Lodmoor
- Loetoe Monarch
- Loggerhead Kingbird
- Loggerhead Shrike
- Loja Hummingbird
- Lompobattang Flycatcher
- Long-bearded Melidectes
- Long-billed Bush Warbler
- Long-billed Corella
- Long-billed Crombec
- Long-billed dowitcher
- Long-billed Gnatwren
- Long-billed Hermit
- Long-billed Honeyeater
- Long-billed Partridge
- Long-billed Pipit
- Long-billed Plover
- Long-billed Spiderhunter
- Long-billed Starthroat
- Long-billed thrasher
- Long-billed thrush
- Long-billed white-eye
- Long-billed Woodcreeper
- Long-billed Wren
- Long-billed Wren-Babbler
- Long-billed Wren (New Zealand)
- Long-crested Eagle
- Long-crested Myna
- Long-eared owl
- Long-legged Bunting
- Long-legged buzzard
- Long-legged Pipit
- Long-legged Thicketbird
- Long-tailed Broadbill
- Long-tailed Bush Warbler
- Long-tailed Cinclodes
- Long-tailed Cisticola
- Long-tailed cuckoo
- Long-tailed duck
- Long-tailed Fantail
- Long-tailed Finch
- Long-tailed Fiscal
- Long-tailed Glossy Starling
- Long-tailed Ground Dove
- Long-tailed ground roller
- Long-tailed Hawk
- Long-tailed Hermit
- Long-tailed jaeger
- Long-tailed Meadowlark
- Long-tailed Minivet
- Long-tailed Mockingbird
- Long-tailed Myna
- Long-tailed Nightjar
- Long-tailed Paradigalla
- Long-tailed Paradise Whydah
- Long-tailed parakeet
- Long-tailed Pipit
- Long-tailed Potoo
- Long-tailed Sabrewing
- Long-tailed Shrike
- Long-tailed Sibia
- Long-tailed Silky-flycatcher
- Long-tailed Starling
- Long-tailed thrush
- Long-tailed Tit
- Long-tailed Widowbird
- Long-tailed Woodnymph
- Long-toed Lapwing
- Long-toed stint
- Long-wattled Umbrellabird
- Long-whiskered Owlet
- Long Island (Tasmania)
- Long Pond (Anguilla)
- Longimornis
- Longipteryx
- Longuemare's Sunangel
- Lophogallus
- Lord Derby's parakeet
- Lord Howe Boobook
- Lord Howe Currawong
- Lord Howe Fantail
- Lord Howe Gerygone
- Lord Howe Golden Whistler
- Lord Howe Island
- Lord Howe Parakeet
- Lord Howe pigeon
- Lord Howe silvereye
- Lord Howe Starling
- Lord Howe Swamphen
- Lord Howe Thrush
- Lord Howe Woodhen
- Loré Important Bird Area
- Lore Lindu National Park
- Lough Corrib
- Lough Ennell
- Lough Foyle
- Lough Gara
- Lough Owel
- Lough Ree
- Lough Sheelin
- Louis Agassiz Fuertes
- Louis Fraser
- Louisa Island (Tasmania)
- Louisiade Flowerpecker
- Louisiade White-eye
- Louisiana Waterthrush
- Lourah Island
- Lovebird
- Lovely Fairywren
- Lovely Sunbird
- Loveridge's Sunbird
- Low Rocks and Sterna Island Important Bird Area
- Lowbidgee Floodplain
- Lowendal Islands
- Lower Lough Erne Islands
- Lower Odra Valley Landscape Park
- Lowland Akalat
- Lowland kagu
- Lowland Masked Apalis
- Lowland Sooty Boubou
- Lowland White-eye
- Lox Yeo River
- Loxops
- Lucifer Sheartail
- Lucy's Warbler
- Ludaš Lake
- Ludington State Park
- Ludlow Griscom
- Ludwig's Double-collared Sunbird
- Lufira Masked Weaver
- Lühder's Bushshrike
- Lulu's Tody-Flycatcher
- Lunga, Treshnish Isles
- Lunulated Antbird
- Lupton's Bird of Paradise
- Lutembe Bay
- Luzon hawk-owl
- Luzon Hornbill
- Luzon striped babbler
- Luzon Sunbird
- Luzon Water Redstart
- Lyman Belding
- Lympsham
- Lyng, Somerset
- Lyre-tailed Honeyguide
- Lyre-tailed King Bird of Paradise
- Lyrebird
- Maatsuyker Island
- Maatsuyker Islands
- Mabamba Bay
- Mabira Forest
- Macaroni penguin
- Macauley Island
- Maccoa Duck
- MacGillivray's Warbler
- MacGregor's Bowerbird
- MacGregor's Honeyeater
- Mackinnon's Shrike
- Macleay's Honeyeater
- Macquarie Island
- Macquarie Marshes
- Macquarie Marshes Nature Reserve
- Macquarie Parakeet
- Macquarie Rail
- Macquarie Shag
- MacQueen's Bustard
- Madagascan blue pigeon
- Madagascan Buttonquail
- Madagascan buzzard
- Madagascan Cuckoo-Hawk
- Madagascan Flufftail
- Madagascan Harrier-Hawk
- Madagascan Hoopoe
- Madagascan Ibis
- Madagascan Jacana
- Madagascan Lark
- Madagascan Magpie-Robin
- Madagascan mannikin
- Madagascan Plover
- Madagascan Pygmy Kingfisher
- Madagascan Rail
- Madagascan sandgrouse
- Madagascan serpent eagle
- Madagascan Sparrowhawk
- Madagascan Starling
- Madagascan Swamp Warbler
- Madagascan Wagtail
- Madagascan Wood Rail
- Madanga
- Madarasz's Tiger Parrot
- Madder Cliffs
- Madeira Firecrest
- Madeiran chaffinch
- Madeiran scops owl
- Madeiran wood pigeon
- Magadi Bird Sanctuary
- Magellanic Diving Petrel
- Magellanic Penguin
- Magellanic Plover
- Magellanic Tapaculo
- Magellanic Woodpecker
- Magenta-throated Woodstar
- Magenta Petrel
- Maghreb Lark
- Magnificent Bird-of-paradise
- Magnificent Frigatebird
- Magnificent Hummingbird
- Magnificent Riflebird
- Magnolia Warbler
- Magpie-lark
- Magpie Duck
- Magpie mannikin
- Magpie Shrike
- Magpie Starling
- Magpie Tanager
- Mahé highlands and surrounding areas Important Bird Area
- Mährens
- Main Range National Park
- Major Mitchell's Cockatoo
- Makatea Fruit Dove
- Makira Fantail
- Makira Flycatcher
- Makira Honeyeater
- Makira Starling
- Makira Woodhen
- Malabar Barbet
- Malabar Grey Hornbill
- Malabar Lark
- Malabar Pied Hornbill
- Malabar Starling
- Malabar Trogon
- Malabar Whistling Thrush
- Malachite Kingfisher
- Malachite Sunbird
- Malagasy Black Swift
- Malagasy coucal
- Malagasy Harrier
- Malagasy Kingfisher
- Malagasy pond heron
- Malagasy Sheldgoose
- Malagasy Shelduck
- Malaita white-eye
- Malayan night heron
- Malayan Peacock-Pheasant
- Malayan Whistling Thrush
- Malaysian Eared Nightjar
- Malaysian Honeyguide
- Malcolm Ogilvie
- Malcolm Penny
- Maleo
- Malgas Island
- Malherbe's Parakeet
- Mali Firefinch
- Malia (bird)
- Malindi Pipit
- Mallard
- Mallee Cliffs National Park
- Mallee Emu-wren
- Malleefowl
- Malltraeth
- Malltraeth Marsh
- Malportas Pond
- Malta–Gozo Channel Important Bird Area
- Maluridae
- Mamo
- Manakin
- Manchurian Bush Warbler
- Manchurian Reed Warbler
- Mandarin Duck
- Mandora Marsh
- Maned Owl
- Mangaia Crake
- Mangaia Rail
- Mangaia Swiftlet
- Mangalavanam Bird Sanctuary
- Mangrove cuckoo
- Mangrove Finch
- Mangrove Gerygone
- Mangrove Golden Whistler
- Mangrove Honeyeater
- Mangrove Pitta
- Mangrove Sunbird
- Mangrove Swallow
- Mangrove Whistler
- Manipur Bush Quail
- Manipur fulvetta
- Manowar and Rocky Islands Important Bird Area
- Mantanani scops owl
- Mantell's Moa
- Mantou's Riflebird
- Manucoco
- Manus Friarbird
- Manus Masked Owl
- Manus Monarch
- Manx shearwater
- Many-colored Bushshrike
- Many-colored Chaco Finch
- Many-coloured Fruit Dove
- Many-spotted Hummingbird
- Mao (bird)
- Marabou Stork
- Maracaibo Tody-Flycatcher
- Maranon Pigeon
- Marañón thrush
- Mararoa River
- Marazion Marsh
- Marbled Duck
- Marbled godwit
- Marcapata Spinetail
- Mare aux Hippopotames
- Mare d'Oursi
- Margaret's Batis
- Margaret Cameron (librarian)
- Margaret Morse Nice
- Margaretta Louisa Lemon
- Maria's Bird of Paradise
- Maria Creek National Park
- Maria Island
- Maria Island National Park
- Mariana Fruit Dove
- Mariana Mallard
- Mariana Swiftlet
- Marianne White-eye
- Marico Sunbird
- Marie Louise Island
- Marie Winn
- Marigold Lorikeet
- Marion Bay Important Bird Area
- Mark Brazil
- Mark Catesby
- Mark Yeo
- Marlborough Sounds Important Bird Areas
- Marmaduke Tunstall
- Marojejy National Park
- Maroon-backed Accentor
- Maroon-backed Whistler
- Maroon-bellied Parakeet
- Maroon-fronted Parrot
- Maroon-naped Sunbird
- Maroon Oriole
- Maroon Shining Parrot
- Marquesan Ground Dove
- Marquesan kingfisher
- Marquesan Monarch
- Marquesan Swiftlet
- Marquesas Cuckoo-Dove
- Marquesas Swamphen
- Marsh Antwren
- Marsh Awards for Ornithology
- Marsh Babbler
- Marsh Harrier
- Marsh Owl
- Marsh sandpiper
- Marsh Tapaculo
- Marsh Tchagra
- Marsh Tit
- Marsh Warbler
- Marsh Widowbird
- Marsh Wren
- Marshall's Iora
- Martial Eagle
- Martin Garner
- Martin Moynihan
- Martinique Amazon
- Martinique Macaw
- Martinique Oriole
- Marvellous Spatuletail
- Mary Elizabeth Barber
- Mary Impey
- Mary Russell, Duchess of Bedford
- Maryborough-Dunolly Box-Ironbark Region
- Masafuera Rayadito
- Mascarene Coot
- Mascarene Grey Parakeet
- Mascarene Martin
- Mascarene Paradise Flycatcher
- Mascarene parrot
- Mascarene Petrel
- Mascarene Swiftlet
- Mascarene Teal
- Mascarene White-eye
- Masked Antpitta
- Masked booby
- Masked cardinal
- Masked duck
- Masked Finch
- Masked Finfoot
- Masked Flowerpiercer
- Masked Fruiteater
- Masked Gnatcatcher
- Masked Lapwing
- Masked Saltator
- Masked Shining Parrot
- Masked Shrike
- Masked Tityra
- Masked Trogon
- Masked Water Tyrant
- Masked Woodswallow
- Massachusetts Audubon Society
- Masthead Island
- Mastic Reserve
- Matarakau Point
- Mataura River
- Matchedash Bay
- Matinan Blue Flycatcher
- Matsudaira's Storm Petrel
- Matthews Island
- Matuku (genus)
- Maubara Important Bird Area
- Maui 'Alauahio
- Maui ʻAkepa
- Maui Nui 'Akialoa
- Maui Nui Finch
- Maui Nui Large-billed Moa-nalo
- Maui Nukupuʻu
- Maui Parrotbill
- Mauke Starling
- Maupiti Monarch
- Mavourneen Rocks
- Maxwell's Black Weaver
- Maya (bird)
- Mayang Chosuji
- Mayani Bird Sanctuary
- Mayotte drongo
- Mayotte scops owl
- Mayotte Sunbird
- Mayotte White-eye
- McConnell River Migratory Bird Sanctuary
- McCown's Longspur
- McGregor's Cuckooshrike
- McIlwraith Range
- McKay's Bunting
- Meadow Bunting
- Meadow Pipit
- Meads Bay Pond
- Mealy Amazon
- Meare
- Meare Lake Village
- Meare Pool
- Mebbin National Park
- Mediterranean Gull
- Medium Ground Finch
- Medium Tree Finch
- Meehan Range
- Meek's Lorikeet
- Meek's Pygmy Parrot
- Mees's Nightjar
- Mees's white-eye
- Meikle Loch
- Mekong Wagtail
- Melaleuca to Birchs Inlet Important Bird Area
- Melampitta
- Melanesian Whistler
- Melanocharitidae
- Melbourne Armstrong Carriker
- Meller's Duck
- Melodious Babbler
- Melodious Blackbird
- Melodious Warbler
- Melvin Alvah Traylor, Jr.
- Menetries's Warbler
- Menindee Lakes
- Mentawai scops owl
- Menura tyawanoides
- Mercury Islands
- Mérida Flowerpiercer
- Mérida Wren
- Merlin (bird)
- Meroo National Park
- Merrywing Pond System
- Mesembriornis
- Mesite
- Mesitornis
- Mesopotamian crow
- Metallic-winged Sunbird
- Metallic pigeon
- Metallic Starling
- Mewing Kingfisher
- Mewstone
- Mexican Cacique
- Mexican Chickadee
- Mexican Duck
- Mexican jay
- Mexican Parrotlet
- Mexican Whip-poor-will
- Mexican Woodnymph
- Mexican Yellow Grosbeak
- Meyer's Parrot
- Mgahinga Gorilla National Park
- Michael Brooker
- Michael Clarke (ornithologist)
- Michael John Rogers
- Michael Rank
- Michael Sharland
- Michael Walther
- Michaelmas and Upolu Cays National Park
- Michelsen Island
- Mick Rogers (wildlife warden)
- Microcarbo serventyorum
- Micromacronus
- Micronesian Megapode
- Micronesian myzomela
- Micronesian starling
- Mid Woody Islet
- Midas Island
- Middle American Screech Owl
- Middle Brother (Chagos Bank)
- Middle Island (Lacepede Islands)
- Middle Island, Tristan da Cunha
- Middle Spotted Woodpecker
- Middleton Lakes RSPB reserve
- Midget Flowerpecker
- Mikado Pheasant
- Mike Reynolds (conservationist)
- Miklos Udvardy
- Mile Island
- Milford Sound
- Milingimbi Islands Important Bird Area
- Military Macaw
- Milky Stork
- Mill Dam
- Milosz Point
- Milton N. Hopkins
- Mimosa Rocks National Park
- Minahassa Masked Owl
- Minas Gerais Tyrannulet
- Mindanao Bleeding-heart
- Mindanao Blue Fantail
- Mindanao Brown Dove
- Mindanao Hawk-Owl
- Mindanao Hornbill
- Mindanao Lorikeet
- Mindanao Miniature Babbler
- Mindanao pygmy babbler
- Mindanao Racket-tail
- Mindanao white-eye
- Mindoro Bulbul
- Mindoro Hawk-Owl
- Mindoro Hornbill
- Mindoro Imperial Pigeon
- Minneriya National Park
- Minute Hermit
- Miombo Blue-eared Starling
- Miombo Tit
- Miquelon Island (Northeast Coast) Important Bird Area
- Mishana Tyrannulet
- Mississippi kite
- Mistle thrush
- Mistletoebird
- Mitchell Durno Murray
- Mitred Parakeet
- Mlima Combani and Mlima Mtsapéré Important Bird Area
- Moa
- Moa-nalo
- Mocking Cliff Chat
- Modest Tiger Parrot
- Moe Island
- Mogoltau Massif Important Bird Area
- Mogontiacopsitta
- Moho (genus)
- Mohoidae
- Mohoua
- Moluccan cuckoo
- Moluccan Cuckooshrike
- Moluccan Flycatcher
- Moluccan Goshawk
- Moluccan Hanging Parrot
- Moluccan King Parrot
- Moluccan Masked Owl
- Moluccan Megapode
- Moluccan Owlet-nightjar
- Moluccan Starling
- Moluccan Swiftlet
- Moluccan woodcock
- Monach Islands
- Monfragüe
- Mongolian Finch
- Monica Turner (ornithologist)
- Monk Parakeet
- Monotonous Lark
- Mont Choungui
- Montagne Glacis Important Bird Area
- Montagu's Harrier
- Montague Chamberlain
- Montane Nightjar
- Montane Racket-tail
- Montanha
- Monte Yellow Finch
- Montebello Islands
- Monteiro's Bushshrike
- Monteiro's Hornbill
- Montezuma Oropendola
- Montezuma quail
- Montrose Basin
- Montserrat Oriole
- Moogerah Peaks National Park
- Moora Important Bird Area
- Moorhen
- Moorland Chat
- Moorland francolin
- Moorlinch
- Moose River (Ontario)
- Moose River Estuary
- Mopsitta
- Moray Firth
- Moreau's Sunbird
- Morecambe Bay
- Morehead River Important Bird Area
- Moreno's Ground Dove
- Moresby Range National Park
- Moreton Bay
- Moreton Point
- Mornington Sanctuary
- Moseøya Bird Sanctuary
- Mosque Swallow
- Moss Islands
- Motmot
- Mottle-cheeked Tyrannulet
- Mottled duck
- Mottled Flowerpecker
- Mottled petrel
- Mottled Spinetail
- Mottled Swift
- Mottled wood owl
- Motukaramarama Island
- Motutakapu
- Moulting Lagoon Important Bird Area
- Mount Barney National Park
- Mount Bartle Frere
- Mount Bellenden Ker
- Mount Cameroon Francolin
- Mount Cameroon Speirops
- Mount Chappell Island
- Mount Chinghee National Park
- Mount Clunie National Park
- Mount Curi Important Bird Area
- Mount Diatuto
- Mount Elder
- Mount Elgon National Park
- Mount Gibson Sanctuary
- Mount Jerusalem National Park
- Mount Kumgang
- Mount Kupe Bushshrike
- Mount Lyndhurst Important Bird Area
- Mount Mak Fahik and Mount Sarim Important Bird Area
- Mount Manypeaks
- Mount Nothofagus National Park
- Mountain Bamboo Partridge
- Mountain Barbet
- Mountain blackeye
- Mountain bluebird
- Mountain Bulbul
- Mountain Buzzard
- Mountain Caracara
- Mountain Chickadee
- Mountain Chiffchaff
- Mountain Firetail
- Mountain Fulvetta
- Mountain Hawk-Eagle
- Mountain Imperial Pigeon
- Mountain Oriole
- Mountain Peacock-Pheasant
- Mountain pipit
- Mountain plover
- Mountain quail
- Mountain Robin
- Mountain Robin-Chat
- Mountain Saw-wing
- Mountain scops owl
- Mountain serpent eagle
- Mountain Shrike
- Mountain Sooty Boubou
- Mountain Starling
- Mountain Tailorbird
- Mountain Thornbill
- Mountain thrush
- Mountain Wagtail
- Mountain Wheatear
- Mountain Wren-Babbler
- Mourning Collared Dove
- Mourning dove
- Mourning Wheatear
- Mousa
- Mouse-colored Penduline Tit
- Mouse-colored Thistletail
- Mouse-colored Tyrannulet
- Mouse-coloured Tapaculo
- Mousebird
- Moussier's Redstart
- Moustached Antwren
- Moustached Barbet
- Moustached Brush Finch
- Moustached Grass Warbler
- Moustached Laughingthrush
- Moustached Turca
- Moustached Warbler
- Moustached Woodcreeper
- Mouth of the Cirque de Salazie Important Bird Area
- Mowbray National Park
- Mrs. Gould's Sunbird
- Mrs. Hume's Pheasant
- Muchelney
- Mud Islands
- Mudgee-Wollar Important Bird Area
- Muir's Corella
- Mukojima white-eye
- Mulga Parrot
- Mull of Galloway
- Mullerornis
- Multicoloured Tanager
- Munchique Wood Wren
- Mundaring-Kalamunda Important Bird Area
- Munga-Thirri National Park
- Munghorn Gap Nature Reserve
- Munmorah State Conservation Area
- Murchison Falls National Park
- Muriwai
- Murkay Islets
- Murramarang National Park
- Murray-Sunset National Park
- Murray-Sunset, Hattah and Annuello Important Bird Area
- Murray Island (Antarctica)
- Murray River National Park
- Murrumbidgee Red Gums Important Bird Area
- Murtnaghurt Lagoon
- Muscovy duck
- Musician Wren
- Musk Duck
- Musk Lorikeet
- Mussau Fantail
- Mussau Monarch
- Mutton Bird Island
- Mykines
- Myohyangsan
- Myrtle Warbler
- Mysterious Bird of Bobairo
- Nadgee Nature Reserve
- Nadgee to Mallacoota Inlet Important Bird Area
- Nagshead
- Nagshead SSSI
- Nahan's Partridge
- Najafgarh drain bird sanctuary
- Naked-faced Barbet
- Naked-faced Spiderhunter
- Nal Sarovar Bird Sanctuary
- Namaqua Dove
- Namaqua sandgrouse
- Namaqua Warbler
- Nambashag
- Namibiavis
- Namuli Apalis
- Nanantius
- Nanday Parakeet
- Nankeen Kestrel
- Nankeen night heron
- Narcissus Flycatcher
- Narcondam Hornbill
- Narcondam Island
- Narina Trogon
- Narran Wetlands
- Narrow-billed Antwren
- Narrow-billed Tody
- Narrow-tailed Starling
- Nashville Warbler
- Natimuk-Douglas Wetlands
- National Audubon Society
- National Aviary
- National Eagle Center
- National Wild Turkey Federation
- Native Bay
- Natterer's Slaty Antshrike
- Naumann's thrush
- Naung Mung Scimitar Babbler
- Nava's Wren
- Nawabganj Bird Sanctuary
- Neblina Tapaculo
- Nechisar Nightjar
- Necklaced Spinetail
- Neddicky
- Neds Reef
- Needle Rocks
- Neerabup National Park
- Negros Bleeding-heart
- Negros fruit dove
- Negros scops owl
- Negros striped babbler
- Nelepsittacus
- Nelicourvi Weaver
- Nelson's Sparrow
- Nelsons Island
- Nēnē-nui
- Nene (bird)
- Nene Washes
- Neocathartes
- Neogyps
- Neomixis
- Neophrontops
- Neotropic cormorant
- Neotropical Palm Swift
- Nepal Fulvetta
- Nepal house martin
- Nepal Rufous-vented Prinia
- Nepal Wren-babbler
- Nesoenas
- Nestoridae
- Neumann's Starling
- Neville William Cayley
- New Britain Bronzewing
- New Britain Friarbird
- New Britain Goshawk
- New Caledonian Barn Owl
- New Caledonian crow
- New Caledonian Cuckooshrike
- New Caledonian Friarbird
- New Caledonian Gallinule
- New Caledonian Ground Dove
- New Caledonian Lorikeet
- New Caledonian Myzomela
- New Caledonian Owlet-nightjar
- New Caledonian Parakeet
- New Caledonian Rail
- New Caledonian Snipe
- New Caledonian Thicketbird
- New England National Park
- New Guinea Thornbill
- New Hanover mannikin
- New Holland Honeyeater
- New Ireland Boobook
- New Ireland Friarbird
- New Ireland Myzomela
- New Island
- New Jersey Audubon Society
- New South Wales Albatross Study Group
- New Year Island (Tasmania)
- New York City Audubon
- New Zealand bellbird
- New Zealand bittern
- New Zealand Coot
- New Zealand fairy tern
- New Zealand falcon
- New Zealand fantail
- New Zealand fernbird
- New Zealand geese
- New Zealand grebe
- New Zealand kaka
- New Zealand musk duck
- New Zealand owlet-nightjar
- New Zealand parrot
- New Zealand pigeon
- New Zealand plover
- New Zealand quail
- New Zealand raven
- New Zealand robin
- New Zealand rockwren
- New Zealand scaup
- New Zealand Stiff-tailed Duck
- New Zealand storm petrel
- New Zealand wren
- Newell's shearwater
- Newfoundland Crossbill
- Newport Wetlands
- Newry Station
- Newton's Sunbird
- Newtonia (bird)
- Ngarkat Conservation Park
- Niam-niam Parrot
- Nias Hill Myna
- Nicaraguan Grackle
- Niceforo's Pintail
- Niceforo's Wren
- Nicholas Aylward Vigors
- Nicholas Barry Davies
- Nicholas Hammond (ornithologist)
- Nicobar Bulbul
- Nicobar Megapode
- Nicobar Parakeet
- Nicobar Pigeon
- Nicobar scops owl
- Nicobar Sparrowhawk
- Nigg Bay
- Night Island (Queensland)
- Night Island (Tasmania)
- Night Parrot
- Nightcap National Park
- Nightcap Range Important Bird Area
- Nightingale Island
- Nightingale Islands
- Nigula Nature Reserve
- Nihoa Finch
- Nihoa Millerbird
- Nilgiri Blue Robin
- Nilgiri Flowerpecker
- Nilgiri Flycatcher
- Nilgiri Pipit
- Nilgiri wood pigeon
- Nimba Flycatcher
- Nino Konis Santana National Park
- Ninth Island
- Niue night heron
- Niue Rail
- Nkulengu Rail
- Noble Megapode
- Noble Snipe
- Noel Learmonth
- Noisy Friarbird
- Noisy miner
- Noisy Pitta
- Noisy Scrubbird
- Nólsoy
- Nonggang babbler
- Nordaust-Svalbard Nature Reserve
- Nordenskiöld Land
- Nordmann's Greenshank
- Nordvest-Spitsbergen National Park
- Norfolk Boobook
- Norfolk Golden Whistler
- Norfolk Ground Dove
- Norfolk Island
- Norfolk kaka
- Norfolk Pacific Robin
- Norfolk pigeon
- Norfolk Starling
- Norfolk Thrush
- Norfolk Triller
- Norman Bird Sanctuary
- Norman Boyd Kinnear
- Norman Chaffer
- Norman Frederick Frome
- Norman Island (Victoria)
- Norman Joseph Favaloro
- Norman Wettenhall
- Noronha Elaenia
- Noronha Vireo
- Norsel Point
- North-east Saint Helena Important Bird Area
- North-west Tasmanian Coast Important Bird Area
- North American landbirds in Britain
- North American Waterfowl Management Plan
- North and South Brother Islands, East River
- North Brother (Chagos Bank)
- North Curry
- North Curry Meadow
- North Dandalup Important Bird Area
- North East Reef
- North Foreland (South Shetland Islands)
- North Island (Houtman Abrolhos)
- North Island Giant Moa
- North Island Piopio
- North Island Robin
- North Island snipe
- North Island takahē
- North Keeling
- North Kent Island
- North Moor
- North Rona
- North Somerset Levels
- North Victorian Wetlands
- North Warren RSPB reserve
- North West Island
- North West Mount Chappell Islet
- Northeim Lake District
- Northern bald ibis
- Northern Beardless Tyrannulet
- Northern Black Flycatcher
- Northern Boobook
- Northern cardinal
- Northern Carmine Bee-eater
- Northern crested caracara
- Northern Crombec
- Northern Double-collared Sunbird
- Northern Flicker
- Northern Forested Ghauts
- Northern fulmar
- Northern gannet
- Northern Giant Petrel
- Northern Golden Bulbul
- Northern goshawk
- Northern Grey-headed Sparrow
- Northern Hawk-Owl
- Northern jacana
- Northern lapwing
- Northern mockingbird
- Northern Nightingale-Wren
- Northern Parula
- Northern pintail
- Northern Potoo
- Northern Puffback
- Northern Pygmy Owl
- Northern Red Bishop
- Northern Rosella
- Northern rough-winged swallow
- Northern Royal Albatross
- Northern Royal Flycatcher
- Northern Saw-whet Owl
- Northern Schiffornis
- Northern shoveler
- Northern Shrike
- Northern Slaty Antshrike
- Northern Spotted Owl
- Northern Swan Coastal Plain Important Bird Area
- Northern Waterthrush
- Northern Wheatear
- Northern White-crowned Shrike
- Northern White-faced Owl
- Northwestern crow
- Nottinghamshire Wildlife Trust
- NSW Field Ornithologists Club
- Nubian Bustard
- Nubian Woodpecker
- Nugent Island
- Nuku Hiva Monarch
- Nuku Hiva Rail
- Nullarbor Quail-thrush
- Numfor Paradise Kingfisher
- Numinbah Nature Reserve
- Nuthatch Vanga
- Nuttall's Woodpecker
- Nuttall Ornithological Club
- Nutting's Flycatcher
- Nuyts Archipelago
- O'ahu ‘Elepaio
- O'ahu Moa-nalo
- O'ahu Petrel
- O'Brien Island
- Oahu 'Akialoa
- Oʻahu ʻAkepa
- Oʻahu ʻAmakihi
- Oʻahu ʻŌʻō
- Oak Hammock Marsh
- Oak Titmouse
- Oasis Hummingbird
- Oaxaca Sparrow
- Obbia Lark
- Oberländer's ground thrush
- Obscure Berrypecker
- Oceanic Eclectus Parrot
- Ocellated Quail
- Ocellated Thrasher
- Ocellated Turkey
- Ochraceous Wren
- Ochre-bellied Boobook
- Ochre-breasted Pipit
- Ochre-browed Thistletail
- Ochre-fronted Antpitta
- Ochre-marked Parakeet
- Ochre-naped Ground Tyrant
- Oeno Island
- Ogasan Nature Reserve
- Oilbird
- Okawa Point
- Okhla Sanctuary
- Okinawa Rail
- Okinawa Woodpecker
- Oksem, Dongsolbatsem, Sesolbatsem and Namsolbatsem Islands Important Bird Area
- Old Crow Flats
- Old Moor Wetland Centre RSPB reserve
- Olin Sewall Pettingill Jr
- Olivaceous Flycatcher
- Olivaceous Woodcreeper
- Olive-backed Flowerpecker
- Olive-backed Foliage-gleaner
- Olive-backed Oriole
- Olive-backed Pipit
- Olive-backed Sunbird
- Olive-backed Woodpecker
- Olive-bellied Sunbird
- Olive-brown Oriole
- Olive-capped Flowerpecker
- Olive-capped Warbler
- Olive-colored white-eye
- Olive-crowned Flowerpecker
- Olive-flanked Ground Robin
- Olive-green Camaroptera
- Olive-green Tyrannulet
- Olive-headed Lorikeet
- Olive-tree Warbler
- Olive Bee-eater
- Olive Bulbul
- Olive Honeyeater
- Olive Ibis
- Olive long-tailed cuckoo
- Olive Sparrow
- Olive Sunbird
- Olive Tanager
- Olive thrush
- Olive Warbler
- Olive Whistler
- Oliver G. Pike
- Oliver L. Austin
- Oliver Michael Griffiths Newman
- Oliver Vernon Aplin
- Olrog's Cinclodes
- Olrog's Gull
- Olsholmen Bird Sanctuary
- Omani Owl
- Onagadori
- Onchon Field
- One Tree Island (Queensland)
- Ongjin Bay Important Bird Area
- Onychognathus
- Oostvaardersplassen
- Opal-crowned Tanager
- Open Bay Islands
- Operation Migration
- Opihi River
- Opisthocomidae
- Opuha Dam
- Orangchon River estuary Important Bird Area
- Orange-bellied Antwren
- Orange-bellied Euphonia
- Orange-bellied Flowerpecker
- Orange-bellied Fruit Dove
- Orange-bellied Leafbird
- Orange-bellied Manakin
- Orange-bellied Parrot
- Orange-bellied Trogon
- Orange-billed Babbler
- Orange-billed Lorikeet
- Orange-billed nightingale-thrush
- Orange-billed Sparrow
- Orange-breasted Bunting
- Orange-breasted Bushshrike
- Orange-breasted falcon
- Orange-breasted Fig Parrot
- Orange-breasted Fruiteater
- Orange-breasted Green Pigeon
- Orange-breasted Laughingthrush
- Orange-breasted Sunbird
- Orange-breasted Thornbird
- Orange-breasted Trogon
- Orange-breasted Waxbill
- Orange-cheeked Honeyeater
- Orange-cheeked Parrot
- Orange-cheeked Waxbill
- Orange-eyed Thornbird
- Orange-footed Scrubfowl
- Orange-fronted Hanging Parrot
- Orange-fronted Parakeet
- Orange-headed thrush
- Orange-sided thrush
- Orange-spotted Bulbul
- Orange-throated Sunangel
- Orange-throated Tanager
- Orange-tufted Sunbird
- Orange-winged Pytilia
- Orange Bullfinch
- Orange Chat
- Orange Fruit Dove
- Orange ground thrush
- Orange Oriole
- Orange Weaver
- Orangequit
- Orari River
- Orchard Oriole
- Ord Irrigation Area Important Bird Area
- Oreti River
- Orford, Tasmania
- Organisation for the Preservation of Birds and their Habitat
- Orielton Lagoon
- Oriental Bay Owl
- Oriental cuckoo
- Oriental Darter
- Oriental Dwarf Kingfisher
- Oriental Hobby
- Oriental Magpie-Robin
- Oriental Pied Hornbill
- Oriental Plover
- Oriental pratincole
- Oriental Reed Warbler
- Oriental scops owl
- Oriental Skylark
- Oriental Stork
- Oriental Turtle Dove
- Oriental White-eye
- Oriente Warbler
- Orinoco Goose
- Orinoco Saltator
- Orinoco Softtail
- Oriole Finch
- Oriole Warbler
- Oriole Whistler
- Ornate Hawk-Eagle
- Ornate Lorikeet
- Ornate Melidectes
- Ornimegalonyx
- Orthonyx hypsilophus
- Orthonyx kaldowinyeri
- Ortolan Bunting
- Osbert Salvin
- Osprey
- Ospreys in Britain
- Osteodontornis
- Otmoor RSPB reserve
- Otterhampton
- ʻŌʻū
- Ouse Washes
- Oustalet's Tyrannulet
- Outlying Islands (play)
- Outram Bangs
- Ouvea Parakeet
- Ovambo Sparrowhawk
- Ovenbird
- Ovenbird (family)
- Owen Island
- Owingup Swamp and Boat Harbour Wetlands Important Bird Area
- Oyster Rocks
- Pachydyptes
- Pachyornis
- Pachyplichas
- Pachyplichas jagmi
- Pacific-slope Flycatcher
- Pacific Baza
- Pacific Black Duck
- Pacific Coast Joint Venture
- Pacific golden plover
- Pacific Gull
- Pacific Imperial Pigeon
- Pacific loon
- Pacific Pygmy Owl
- Pacific Reef heron
- Pacific Robin
- Pacific Royal Flycatcher
- Pacific screech owl
- Pacific Seabird Group
- Pacific Swallow
- Pacific swift
- Pacific Wren
- Paddyfield Pipit
- Paddyfield Warbler
- Paddys Island
- Paektu Mountain
- Pagham Harbour
- Painted berrypecker
- Painted Bunting
- Painted Bush Quail
- Painted Buttonquail
- Painted Finch
- Painted Francolin
- Painted Honeyeater
- Painted Parakeet
- Painted sandgrouse
- Painted Spurfowl
- Painted stork
- Painted Tiger Parrot
- Painted Tody-Flycatcher
- Painted Whitestart
- Paitchau
- Pajaro River
- Pakistani Highflyer
- Palaeeudyptes antarcticus
- Palaeeudyptes marplesi
- Palaelodus
- Palaelodus aotearoa
- Palaelodus pledgei
- Palaelodus wilsoni
- Palaeoephippiorhynchus
- Palaeoglaux
- Palaeospheniscus patagonicus
- Palaeospheniscus wimani
- Palaeospiza bella
- Palawan Blue Flycatcher
- Palawan Flowerpecker
- Palawan Flycatcher
- Palawan Hornbill
- Palawan Peacock-Pheasant
- Palawan striped babbler
- Palawan Swiftlet
- Palawan Tit
- Pale-bellied white-eye
- Pale-billed Antpitta
- Pale-billed Flowerpecker
- Pale-billed Parrotbill
- Pale-billed Sicklebill
- Pale-billed Woodpecker
- Pale-blue Monarch
- Pale-breasted illadopsis
- Pale-breasted thrush
- Pale-browed Treehunter
- Pale-capped pigeon
- Pale-chinned Blue Flycatcher
- Pale-crested Woodpecker
- Pale-eyed thrush
- Pale-faced Bare-eye
- Pale-faced Bulbul
- Pale-footed Bush Warbler
- Pale-fronted Nigrita
- Pale-headed Brush Finch
- Pale-headed Jacamar
- Pale-headed munia
- Pale-headed Rosella
- Pale-headed Woodpecker
- Pale-legged Leaf Warbler
- Pale-legged Warbler
- Pale-shouldered Cicadabird
- Pale-tailed Barbthroat
- Pale-vented thrush
- Pale-winged Trumpeter
- Pale-yellow Robin
- Pale Batis
- Pale Blue Flycatcher
- Pale Chanting Goshawk
- Pale Cicadabird
- Pale crag martin
- Pale Flycatcher
- Pale Mountain Pigeon
- Pale Rockfinch
- Pale thrush
- Paleopsilopterus
- Palestine Sunbird
- Palila
- Palintropus
- Pallas's fish eagle
- Pallas's Gull
- Pallas's Leaf Warbler
- Pallas's sandgrouse
- Pallid cuckoo
- Pallid Harrier
- Pallid scops owl
- Pallid Spinetail
- Pallid Swift
- Palm-nut Vulture
- Palm Cockatoo
- Palm crow
- Palm Islands Nature Reserve
- Palm Lorikeet
- Palm Tanager
- Palm Warbler
- Palmchat
- Palmgrove National Park
- Paltry Tyrannulet
- Paluma Important Bird Area
- Paluma Range National Park
- Pamela C. Rasmussen
- Pampas Pipit
- Pan-African Ornithological Congress
- Panama Amazon
- Panamanian Flycatcher
- Panamanian Tyrannulet
- Panay striped babbler
- Pangani Longclaw
- Panmun Field
- Paparoa National Park
- Paperbark Flycatcher
- Papuan eagle
- Papuan Harrier
- Papuan King Parrot
- Papuan Lorikeet
- Papuan Parrotfinch
- Papuan Spine-tailed Swift
- Para Foliage-gleaner
- Paracathartes
- Paradise-crow
- Paradise drongo
- Paradise Jacamar
- Paradise Parrot
- Paradise Riflebird
- Paradise shelduck
- Paradise Tanager
- Parahesperornis
- Paramillo Tapaculo
- Paramo Pipit
- Paramo Tapaculo
- Paraphysornis
- Parasitic jaeger
- Pardalote
- Pardusco
- Paria Brush Finch
- Paria Whitestart
- Parker's Antbird
- Parlor Roller
- Parodi's Hemispingus
- Paroo-Darling National Park
- Paroo Floodplain and Currawinya Important Bird Area
- Parrot-billed Sparrow
- Parrot Crossbill
- Parrots of New Guinea
- Parrots of New Zealand
- Parsik Hill
- Partridge Pigeon
- Parvigrus
- Passage Island (Tasmania)
- Passage Islands
- Passenger pigeon
- Pat Hall
- Patagonian Canastero
- Patagonian Crested Duck
- Patagonian Mockingbird
- Patagonian Yellow Finch
- Patagopteryx
- Patagornis
- Pathiramanal
- Patho Plains Important Bird Area
- Patna Bird Sanctuary
- Patricia Vickers-Rich
- Paul Johnsgard
- Paul Salaman
- Paulet Island
- Pauline Neura Reilly
- Pauraque
- Pavonine cuckoo
- Pavonine Quetzal
- Pawlett, Somerset
- Payne Islands
- Peaceful Dove
- Peach-fronted Parakeet
- Peale's Falcon
- Pearce, Urquhart and Hervey Islands Important Bird Area
- Pearl-bellied White-eye
- Pearl-breasted Swallow
- Pearl-spotted Owlet
- Pearl Kite
- Pearl Rocks
- Pearly-eyed Thrasher
- Pearly Parakeet
- Peat extraction on the Somerset Levels
- Peat Moors Centre
- Pebble Island
- Pectoral-patch Cisticola
- Pectoral Antwren
- Pectoral sandpiper
- Pedra Badejo lagoons Important Bird Area
- Pedra Branca (Tasmania)
- Peebinga Conservation Park
- Peel-Harvey Estuary
- Peene Valley
- Peg-billed Finch
- Pel's Fishing Owl
- Pelagic cormorant
- Pelagornis
- Pelecanoides miokuaka
- Pelecanus cadimurka
- Pelecanus halieus
- Pelecanus odessanus
- Pelecanus schreiberi
- Pelecanus tirarensis
- Pelican Island (Tasmania)
- Pelsaert Group
- Pelzeln's Tody-Tyrant
- Pemba Green Pigeon
- Pemba scops owl
- Pemba Sunbird
- Pemba White-eye
- Pendjari National Park
- Penduline tit
- Penelope Diane Olsen
- Pengana
- Penguin Island (South Shetland Islands)
- Penguin Islet (Tasmania)
- Penguin Point (Seymour Island)
- Péninsule Jeanne d'Arc
- Péninsule Loranchet
- Péninsule Rallier du Baty
- Pennant-winged Nightjar
- Percy Edwards
- Percy Lowe
- Père David's Snowfinch
- Père David's Tit
- Peregrine falcon
- Perijá Brush Finch
- Pernambuco Foliage-gleaner
- Pernambuco Pygmy Owl
- Peron Islands
- Perpendicular Point
- Pershing State Park
- Peruvian Antpitta
- Peruvian Booby
- Peruvian pelican
- Peruvian Piedtail
- Peruvian Plantcutter
- Peruvian Seaside Cinclodes
- Peruvian Sheartail
- Peruvian Tyrannulet
- Peruvian Warbling Antbird
- Peruvian Wren
- Pesquet's Parrot
- Peter Brown (naturalist)
- Peter Colston
- Peter Conder
- Peter Gladstone
- Peter Hayman
- Peter J. Grant
- Peter Kaestner
- Peter Lansdown
- Peter Scott
- Peter Slater
- Petermann Island
- Petit's Cuckooshrike
- Petite Ile Bois Mangue
- Peveto Woods Bird & Butterfly Sanctuary
- Pfrimer's Parakeet
- Phaenicophilus
- Phainopepla
- Pharaoh Eagle-Owl
- Pharomachrus
- Phasmagyps
- Pheasant-tailed Jacana
- Pheasant cuckoo
- Pheasants Forever
- Philadelphia Vireo
- Philip Ashmole
- Philip Hollom
- Philip Sclater
- Philippa's Crombec
- Philippine Bulbul
- Philippine coucal
- Philippine creeper
- Philippine drongo-cuckoo
- Philippine Duck
- Philippine Dwarf Kingfisher
- Philippine eagle
- Philippine Eagle-Owl
- Philippine Fairy-bluebird
- Philippine Falconet
- Philippine Frogmouth
- Philippine Hanging Parrot
- Philippine hawk-cuckoo
- Philippine Hawk-Eagle
- Philippine Hawk-Owl
- Philippine Leafbird
- Philippine Megapode
- Philippine Nightjar
- Philippine Oriole
- Philippine Pygmy Woodpecker
- Philippine scops owl
- Philippine serpent eagle
- Philippine Spine-tailed Swift
- Philippine Swiftlet
- Philippine Trogon
- Phillip Clancey
- Phillip Island (Norfolk Island)
- Phillip Island Important Bird Area
- Phillip Parker King
- Phlogophilus
- Phoebe Snetsinger
- Phoebetria
- Phoeniconotius
- Phoenix Islands Protected Area
- Phorusrhacidae
- Phorusrhacos
- Phyllis Barclay-Smith
- Physornis
- Piapiac
- Picathartes
- Piccaninnie Ponds Conservation Park
- Pictorella Mannikin
- Pied-billed grebe
- Pied-winged Swallow
- Pied Avocet
- Pied bronze cuckoo
- Pied Bush Chat
- Pied Butcherbird
- Pied crow
- Pied Cuckoo-Dove
- Pied Cuckooshrike
- Pied currawong
- Pied Falconet
- Pied Harrier
- Pied heron
- Pied Honeyeater
- Pied Imperial Pigeon
- Pied kingfisher
- Pied Monarch
- Pied Myna
- Pied Oystercatcher
- Pied raven
- Pied Starling
- Pied thrush
- Pied Triller
- Pied Water Tyrant
- Pied Wheatear
- Pierce Brodkorb
- Pigmy Pouter
- Pile-builder Megapode
- Pileated Flycatcher
- Pileated Parrot
- Pileated Woodpecker
- Pilliga forest
- Pilotbird
- Pin-striped tit-babbler
- Pin-tailed Green Pigeon
- Pin-tailed Manakin
- Pin-tailed Parrotfinch
- Pin-tailed sandgrouse
- Pin-tailed snipe
- Pin-tailed Whydah
- Pine Bunting
- Pine Flycatcher
- Pine Grosbeak
- Pine Siskin
- Pine Warbler
- Pink-backed Pelican
- Pink-billed Parrotfinch
- Pink-browed Rosefinch
- Pink-eared Duck
- Pink-footed goose
- Pink-footed Puffback
- Pink-footed shearwater
- Pink-headed Duck
- Pink-headed Fruit Dove
- Pink-headed Imperial Pigeon
- Pink-headed Warbler
- Pink-legged Graveteiro
- Pink-legged Rail
- Pink-necked Green Pigeon
- Pink-throated twinspot
- Pink Lake (Western Australia)
- Pink Robin
- Pinnated bittern
- Pinpanetta
- Pinsker's Hawk-Eagle
- Pinto's Spinetail
- Pinyon Jay
- Piopio (bird)
- Piper Islands National Park
- Piping crow
- Piping Hornbill
- Piping plover
- Piping Shrike
- Pipipi
- Pirie Peninsula
- Pirre Bush Tanager
- Pitcairn Islands
- Piton des Neiges – Gros Morne Important Bird Area
- Pitt Shag
- Pitta-like Ground Roller
- Pitti
- Piura Chat-Tyrant
- Plain-backed Pipit
- Plain-backed Sparrow
- Plain-backed Sunbird
- Plain-backed thrush
- Plain-bellied Emerald
- Plain-brown Woodcreeper
- Plain-capped Starthroat
- Plain-flanked Rail
- Plain-mantled Tit-Spinetail
- Plain-tailed Nighthawk
- Plain-tailed Warbling Finch
- Plain-winged Woodcreeper
- Plain Bush-hen
- Plain chachalaca
- Plain Flowerpecker
- Plain Gerygone
- Plain Greenbul
- Plain Laughingthrush
- Plain Leaf Warbler
- Plain Mountain Finch
- Plain Nightjar
- Plain Parakeet
- Plain Pigeon
- Plain Prinia
- Plain Sunbird
- Plain Swift
- Plain Wren
- Plaine des Chicots – Plaine d'Affouches Important Bird Area
- Plains-wanderer
- Plaintive cuckoo
- Planalto Hermit
- Planalto Slaty Antshrike
- Planalto Tapaculo
- Planalto Tyrannulet
- Plankeholmane Bird Sanctuary
- Plate-billed Mountain Toucan
- Plateau des Tourbières
- Pleske's Ground Jay
- Plotopteridae
- Plover Islands
- Plum-faced Lorikeet
- Plum-headed Finch
- Plum-headed Parakeet
- Plumbeous-backed thrush
- Plumbeous Antvireo
- Plumbeous Forest Falcon
- Plumbeous hawk
- Plumbeous Ibis
- Plumbeous Kite
- Plumbeous Vireo
- Plumbeous Warbler
- Plumbeous Water Redstart
- Plumed Guineafowl
- Plush-crested Jay
- Point-tailed Palmcreeper
- Point Blue Conservation Science
- Point Martin
- Point of Ayr
- Point Pelee National Park
- Point Wilson, Victoria
- Point Wordie
- Pointe Mouillee State Game Area
- Polden Hills
- Poliocephalus (grebe)
- Pollen's Vanga
- Polynesian Ground Dove
- Polynesian Imperial Pigeon
- Polynesian sandpiper
- Polynesian Starling
- Polynesian Triller
- Pomarine skua
- Pompadour Cotinga
- Pompadour Green Pigeon
- Poole Harbour
- Poor Knights Islands
- Poʻouli
- Pope's Eye
- Poplar Thicket
- Porbandar Bird Sanctuary
- Port Colborne
- Port Davey
- Port Davey Islands Important Bird Area
- Port Fairy to Warrnambool Important Bird Area
- Port Hedland Saltworks Important Bird Area
- Port McArthur Tidal Wetlands System
- Portmore Lough
- Potamornis
- Potter Peninsula
- Pottinger Point
- Powerful Goshawk
- Powerful Owl
- Prairie falcon
- Prairie Habitat Joint Venture
- Prairie Warbler
- Prall's Island
- Praslin National Park and surrounding areas Important Bird Area
- Predicted Antwren
- Presbyornis
- Presqu'ile Provincial Park
- Preuss's cliff swallow
- Preuss's Weaver
- Prevost's Ground Sparrow
- Prickly Pear Cays
- Prideaux John Selby
- Prigogine's Greenbul
- Primapus
- Primitive Koa Finch
- Primobucco
- Primophaps
- Prince Edward Island National Park
- Prince Leopold Island
- Prince Leopold Island Migratory Bird Sanctuary
- Prince Regent and Mitchell River Important Bird Area
- Princess Parrot
- Princess Stephanie's Astrapia
- Príncipe Kingfisher
- Príncipe Speirops
- Principe Starling
- Príncipe Sunbird
- Príncipe thrush
- Príncipe Weaver
- Príncipe White-eye
- Pririt Batis
- Proapteryx
- Procariama
- Prong-billed Barbet
- Protea Canary
- Prothonotary Warbler
- Protopelicanus
- Protopteryx
- Przevalski's Nuthatch
- Przevalski's Parrotbill
- Przevalski's Redstart
- Pseudocrypturus
- Psilopterus
- Psittacopes
- Psittacus
- Pterodromoides
- Puaiohi
- Puckapunyal
- Pueo
- Puerto Rican Amazon
- Puerto Rican Barn Owl
- Puerto Rican Broad-winged Hawk
- Puerto Rican Bullfinch
- Puerto Rican Conure
- Puerto Rican crow
- Puerto Rican Emerald
- Puerto Rican Flycatcher
- Puerto Rican lizard cuckoo
- Puerto Rican Nightjar
- Puerto Rican Oriole
- Puerto Rican Quail-Dove
- Puerto Rican screech owl
- Puerto Rican Sharp-shinned Hawk
- Puerto Rican spindalis
- Puerto Rican Tanager
- Puerto Rican Tody
- Puerto Rican Vireo
- Puerto Rican Woodpecker
- Puff-throated Babbler
- Puffin
- Puffin Island (County Kerry)
- Puffinus nestori
- Puffleg
- Pukeko
- Pulau Ubin
- Pulborough Brooks
- Pulicat Lake Bird Sanctuary
- Pulitzer's Longbill
- Pumicestone Passage
- Puna Teal
- Puna Thistletail
- Puriton
- Purple-backed Sunbeam
- Purple-bearded Bee-eater
- Purple-bellied Lory
- Purple-bibbed Whitetip
- Purple-crowned Fairy
- Purple-crowned Fairywren
- Purple-crowned Lorikeet
- Purple-gaped Honeyeater
- Purple-headed Starling
- Purple-naped Lory
- Purple-naped Sunbird
- Purple-rumped Sunbird
- Purple-tailed Imperial Pigeon
- Purple-throated Carib
- Purple-throated Cuckooshrike
- Purple-throated Fruitcrow
- Purple-throated Mountaingem
- Purple-throated Sunbird
- Purple-throated Woodstar
- Purple-winged Roller
- Purple cochoa
- Purple grenadier
- Purple heron
- Purple Honeycreeper
- Purple Indigobird
- Purple Martin
- Purple Roller
- Purple sandpiper
- Purple Starling
- Purple Sunbird
- Purple swamphen
- Purplish Honeycreeper
- Pursuit Point
- Puttenahalli Lake (Yelahanka)
- Putting Biodiversity on the Map
- Puvel's illadopsis
- Pygmy Antwren
- Pygmy Batis
- Pygmy Bushtit
- Pygmy Cormorant
- Pygmy Cuckooshrike
- Pygmy Falcon
- Pygmy Flowerpecker
- Pygmy Flycatcher
- Pygmy Hanging Parrot
- Pygmy Lorikeet
- Pygmy Nightjar
- Pygmy Nuthatch
- Pygmy Sunbird
- Pygmy Swiftlet
- Pygmy white-eye
- Pygmy Wren-babbler
- Pygoscelis tyreei
- Pyrrhuloxia
- Quail-plover
- Quailfinch Indigobird
- Quebrada de los Cuervos
- Queen Carola's Parotia
- Queen Elizabeth II Botanic Park
- Queen Elizabeth National Park
- Queen Maud Gulf Migratory Bird Sanctuary
- Queensland Ornithological Society Inc
- Quercypsitta
- Quill Lakes
- Quoin Bluff
- R. S. R. Fitter
- Rab-do and Muki-do Islands Important Bird Area
- Rabbit Island (Chatham Islands)
- Rachel's Malimbe
- Rackelhahn
- Racket-tailed Coquette
- Radde's Accentor
- Radde's Warbler
- Radipole Lake
- Raggiana bird-of-paradise
- Rahasane turlough
- Raiganj Wildlife Sanctuary
- Rail-babbler
- Raimondi's Yellow Finch
- Rain Quail
- Rainbow-billed Toucan
- Rainbow Bee-eater
- Rainbow Lorikeet
- Rainbow Pitta
- Raine Island
- Rainforest scops owl
- Raja Shelduck
- Rajah scops owl
- Rakaia River
- Ralph Hoffmann
- Ralphs Bay
- Ram Island (Tasmania)
- Ramsey Island
- Ranganthittu Bird Sanctuary
- Rangkul Valley Important Bird Area
- Ranongga White-eye
- Raoul Island
- Rapa Fruit Dove
- Rapa Iti
- Raphinae
- Raptor Education Group
- Raptor Research Foundation
- Rare Breeding Birds Panel
- Rarotonga Monarch
- Rarotonga Starling
- Rasmussen Lowlands
- Raso Lark
- Rathlin Island
- Ravens of the Tower of London
- Ravine de la Grande Chaloupe Important Bird Area
- Rawnsley's Bowerbird
- Raymond Duncan (ornithologist)
- Raymond Littlejohns
- Razor-billed Curassow
- Razorbill
- Rdum Tal-Madonna Important Bird Area
- Read's Island
- Recherche Archipelago
- Red-and-black Grosbeak
- Red-and-black thrush
- Red-and-blue Lory
- Red-and-green Macaw
- Red-and-white Antpitta
- Red-and-white Spinetail
- Red-and-yellow Barbet
- Red-backed fairywren
- Red-backed Kingfisher
- Red-backed mannikin
- Red-backed Shrike
- Red-backed thrush
- Red-banded Flowerpecker
- Red-banded Fruiteater
- Red-bellied Fruit Dove
- Red-bellied Grackle
- Red-bellied Macaw
- Red-bellied Malimbe
- Red-bellied Paradise Flycatcher
- Red-bellied Parrot
- Red-billed Blue Magpie
- Red-billed Brushturkey
- Red-billed chough
- Red-billed Curassow
- Red-billed Dwarf Hornbill
- Red-billed firefinch
- Red-billed ground cuckoo
- Red-billed Gull
- Red-billed Helmetshrike
- Red-billed Hornbill
- Red-billed leiothrix
- Red-billed Parrot
- Red-billed Partridge
- Red-billed Pigeon
- Red-billed Pytilia
- Red-billed Quelea
- Red-billed Scimitar Babbler
- Red-billed Starling
- Red-billed Streamertail
- Red-billed Teal
- Red-billed Toucan
- Red-billed tropicbird
- Red-billed Woodcreeper
- Red-breasted Chat
- Red-breasted coua
- Red-breasted Flycatcher
- Red-breasted Goose
- Red-breasted merganser
- Red-breasted Nuthatch
- Red-breasted Parakeet
- Red-breasted Partridge
- Red-breasted Pygmy Parrot
- Red-breasted Sapsucker
- Red-breasted Swallow
- Red-breasted Wheatear
- Red-browed Amazon
- Red-browed Finch
- Red-browed Pardalote
- Red-browed Treecreeper
- Red-capped cardinal
- Red-capped coua
- Red-capped Crombec
- Red-capped Flowerpecker
- Red-capped Lark
- Red-capped Parrot
- Red-capped Plover
- Red-capped robin
- Red-capped Robin-Chat
- Red-cheeked cordon-bleu
- Red-cheeked Parrot
- Red-cheeked Wattle-eye
- Red-chested Buttonquail
- Red-chested cuckoo
- Red-chested Flufftail
- Red-chested Goshawk
- Red-chested Owlet
- Red-chested Swallow
- Red-chinned Lorikeet
- Red-cockaded Woodpecker
- Red-collared Lorikeet
- Red-collared Widowbird
- Red-collared Woodpecker
- Red-cowled cardinal
- Red-crested cardinal
- Red-crested Pochard
- Red-crested turaco
- Red-crowned Amazon
- Red-crowned crane
- Red-crowned Malimbe
- Red-crowned Parakeet
- Red-eared Firetail
- Red-eared Fruit Dove
- Red-eared Parrotfinch
- Red-eyed Dove
- Red-eyed Puffback
- Red-eyed Vireo
- Red-faced Cisticola
- Red-faced Crimsonwing
- Red-faced Crombec
- Red-faced Guan
- Red-faced Liocichla
- Red-faced malkoha
- Red-faced Mousebird
- Red-faced Parrot
- Red-faced Warbler
- Red-flanked Bluetail
- Red-flanked Lorikeet
- Red-footed booby
- Red-footed falcon
- Red-fronted Antpecker
- Red-fronted coua
- Red-fronted Lorikeet
- Red-fronted Macaw
- Red-fronted Parrot
- Red-fronted Rosefinch
- Red-fronted Serin
- Red-fronted Tinkerbird
- Red-headed Barbet
- Red-headed Bluebill
- Red-headed Bullfinch
- Red-headed Bunting
- Red-headed finch
- Red-headed Fody
- Red-headed Lovebird
- Red-headed Malimbe
- Red-headed Parrotfinch
- Red-headed Quelea
- Red-headed Tanager
- Red-headed Trogon
- Red-headed Vulture
- Red-headed Weaver
- Red-headed Woodpecker
- Red-hooded Tanager
- Red-keeled Flowerpecker
- Red-kneed Dotterel
- Red-knobbed Coot
- Red-legged Cormorant
- Red-legged Crake
- Red-legged Honeycreeper
- Red-legged kittiwake
- Red-legged Partridge
- Red-legged Seriema
- Red-legged thrush
- Red-lored Amazon
- Red-lored Whistler
- Red-mantled Rosefinch
- Red-masked Parakeet
- Red-moustached Fruit Dove
- Red-naped Fruit Dove
- Red-naped Ibis
- Red-naped Sapsucker
- Red-naped Trogon
- Red-necked Amazon
- Red-necked Aracari
- Red-necked Avocet
- Red-necked Buzzard
- Red-necked Crake
- Red-necked Falcon
- Red-necked grebe
- Red-necked Nightjar
- Red-necked phalarope
- Red-necked Spurfowl
- Red-necked stint
- Red-pate Cisticola
- Red-rumped Cacique
- Red-rumped Parrot
- Red-rumped Swallow
- Red-rumped Tinkerbird
- Red-rumped Wheatear
- Red-shouldered Blackbird
- Red-shouldered Cuckooshrike
- Red-shouldered hawk
- Red-shouldered Macaw
- Red-shouldered Spinetail
- Red-shouldered Vanga
- Red-spectacled Amazon
- Red-tailed Amazon
- Red-tailed ant thrush
- Red-tailed black cockatoo
- Red-tailed Bristlebill
- Red-tailed Comet
- Red-tailed Greenbul
- Red-tailed hawk
- Red-tailed Leaflove
- Red-tailed minla
- Red-tailed Newtonia
- Red-tailed Shrike
- Red-tailed tropicbird
- Red-tailed Vanga
- Red-tailed Wheatear
- Red-thighed Sparrowhawk
- Red-throated alethe
- Red-throated Bee-eater
- Red-throated Caracara
- Red-throated cliff swallow
- Red-throated loon
- Red-throated Lorikeet
- Red-throated parrotfinch
- Red-throated Piping Guan
- Red-throated Pipit
- Red-throated thrush
- Red-throated Tit
- Red-throated twinspot
- Red-throated Wood Rail
- Red-throated Wryneck
- Red-vented Bulbul
- Red-vented Cockatoo
- Red-vented Malimbe
- Red-vested Myzomela
- Red-wattled Lapwing
- Red-whiskered Bulbul
- Red-winged Blackbird
- Red-winged Fairywren
- Red-winged francolin
- Red-winged Grey Warbler
- Red-winged Parrot
- Red-winged Pytilia
- Red-winged Starling
- Red-winged Warbler
- Red Avadavat
- Red Bird-of-paradise
- Red Crossbill
- Red Fody
- Red Goshawk
- Red Grouse
- Red Junglefowl
- Red Kite
- Red knot
- Red Lory
- Red phalarope
- Red Siskin
- Red Spurfowl
- Red Turtle Dove
- Red warbler
- Red Wattlebird
- Redberry Lake (Saskatchewan)
- Reddish egret
- Reddish Hermit
- Reddish scops owl
- Redhead (bird)
- Redpoll
- Redthroat
- Redwing
- Reed Cormorant
- Reed Parrotbill
- Reedy Lake
- Reef Hills State Park
- Reeves's Pheasant
- Reg Johnson
- Regent Bowerbird
- Regent Honeyeater
- Regent Parrot
- Reginald Ernest Moreau
- Reichenbach's Sunbird
- Reid Bay
- Reischek's Parakeet
- Relict Gull
- Remiornis
- Rendezvous Bay Pond
- Rennell Fantail
- Rennell Shrikebill
- Rennell Starling
- Rennell White-eye
- Repulse Bay to Ince Bay Important Bird Area
- Resplendent Quetzal
- Restigouche River
- Restinga Antwren
- Restinga Tyrannulet
- Restless Flycatcher
- Return Point
- Réunion Bulbul
- Réunion cuckooshrike
- Réunion Fody
- Réunion Harrier
- Réunion Ibis
- Réunion Kestrel
- Réunion night heron
- Réunion Olive White-eye
- Réunion Owl
- Réunion Parakeet
- Réunion Parrot
- Réunion Pink Pigeon
- Réunion Rail
- Réunion Sheldgoose
- Réunion Stonechat
- Réunion Swamphen
- Rhenanorallus
- Rhinoceros Hornbill
- Rhodacanthis
- Rhynochetos
- Ribble and Alt Estuaries
- Ribbon-tailed Astrapia
- Ribeira do Rabil Important Bird Area
- Richard's Pipit
- Richard Bowdler Sharpe
- Richard C. Banks
- Richard Carew (antiquary)
- Richard Holmes (ornithologist)
- Richard Meinertzhagen
- Richard Millington
- Richard Prum
- Richard Roy Maconachie
- Richard Schodde
- Richard Weatherly
- Richard Zann
- Richardson Bay
- Richmond Woodlands Important Bird Area
- Riddagshausen Abbey
- Ridgway's Hawk
- Rifleman (bird)
- Ring-billed gull
- Ring-necked Dove
- Ring-necked duck
- Ring-necked francolin
- Ring-tailed Pigeon
- Ring Ouzel
- Ringed Antpipit
- Ringed kingfisher
- Ringed Teal
- Ringed Woodpecker
- Rinjani scops owl
- Rinns of Islay
- Rio de Janeiro Antbird
- Rio de Janeiro Antwren
- Rio Grande Valley birds
- River Axe (Bristol Channel)
- River Brue
- River Cary
- River Deben
- River Huntspill
- River Lapwing
- River Parrett
- River Prinia
- River Sheppey
- River Tern (bird)
- River Tone
- River Tyrannulet
- River Warbler
- River Ythan
- Riverina Plains Important Bird Area
- Riverland Biosphere Reserve
- Riverland Mallee Important Bird Area
- Rivière des Marsouins – Grand Étang Important Bird Area
- Rivière des Remparts – Rivière Langevin Important Bird Area
- Road Salt Pond
- Roadside hawk
- Rob Hume
- Robbins Passage and Boullanger Bay Important Bird Area
- Robert Cecil Beavan
- Robert Cushman Murphy
- Robert D. FitzGerald
- Robert Dougall
- Robert George Wardlaw Ramsay
- Robert Gillmor
- Robert Gray (ornithologist)
- Robert Hall (ornithologist)
- Robert Jameson
- Robert Payne (ornithologist)
- Robert Ricklefs
- Robert Ridgely (ornithologist)
- Robert Ridgway
- Robert Stroud
- Robert Sweet (botanist)
- Robert Swinhoe
- Robert Thomas Moore
- Robert Winthrop Storer
- Robertson Islands
- Robin Accentor
- Robust white-eye
- Rock Bunting
- Rock Bush Quail
- Rock dove
- Rock Firefinch
- Rock martin
- Rock of Gibraltar
- Rock Parrot
- Rock Partridge
- Rock Pratincole
- Rock ptarmigan
- Rock Shag
- Rock Sparrow
- Rock Tapaculo
- Rock Wren
- Rockjumper
- Rockwarbler
- Rocky Mountain Bird Observatory
- Rocky Mountain Raptor Program
- Rodolphe Meyer de Schauensee
- Rodondo Island
- Roebuck Bay
- Roger Tory Peterson
- Roland Pope
- Rollo Beck
- Romblon Hawk-Owl
- Ronald Eric Johnstone
- Ronald Hickling
- Rondeau Provincial Park
- Rondônia Bushbird
- Rondonia Warbling Antbird
- Rook (bird)
- Roper River Scrub Robin
- Roraiman Antbird
- Rose-bellied Bunting
- Rose-breasted grosbeak
- Rose-collared Piha
- Rose-crowned Fruit Dove
- Rose-crowned Parakeet
- Rose-fronted Parakeet
- Rose-ringed Parakeet
- Rose-throated Becard
- Rose Robin
- Roseate spoonbill
- Roseate tern
- Rosella
- Rosemary Low
- Ross's goose
- Ross's gull
- Ross's turaco
- Rosy-billed pochard
- Rosy-faced Lovebird
- Rosy-throated Longclaw
- Rosy Bee-eater
- Rosy Minivet
- Rosy Pipit
- Rosy Starling
- Rota white-eye
- Rotamah Island Bird Observatory
- Rothschild's Bird of Paradise
- Rothschild's Lobe-billed Bird of Paradise
- Rottnest Island
- Rotuma Myzomela
- Rouget's Rail
- Rough-crested malkoha
- Rough-faced Shag
- Rough-legged buzzard
- Round Top Island
- Roviana Rail
- Roxie Collie Laybourne
- Roy Bell (ornithologist)
- Roy Percy Cooper
- Royal Australasian Ornithologists Union
- Royal Australasian Ornithologists Union Fellows
- Royal Botanical Gardens (Ontario)
- Royal Parrotfinch
- Royal Society for the Protection of Birds
- Royal Spoonbill
- Royal Sunangel
- Royal tern
- RSPB Bowling Green Marsh
- RSPB Frampton Marsh
- RSPB Minsmere
- Rubeho Forest Partridge
- Rubicon Estuary
- Ruby-cheeked Sunbird
- Ruby-throated Bulbul
- Ruby-throated Hummingbird
- Ruby-topaz Hummingbird
- Rück's Blue Flycatcher
- Rudd's Lark
- Ruddy-breasted Crake
- Ruddy-capped nightingale-thrush
- Ruddy-headed Goose
- Ruddy-tailed Flycatcher
- Ruddy duck
- Ruddy ground dove
- Ruddy Kingfisher
- Ruddy Pigeon
- Ruddy Quail-Dove
- Ruddy Shelduck
- Ruddy turnstone
- Rufescent darkeye
- Rufescent Prinia
- Ruff
- Ruffed grouse
- Rufous-and-white Wren
- Rufous-backed Antvireo
- Rufous-backed Honeyeater
- Rufous-backed Inca Finch
- Rufous-backed Kingfisher
- Rufous-backed Sibia
- Rufous-backed thrush
- Rufous-bellied Antwren
- Rufous-bellied Chachalaca
- Rufous-bellied Hawk-Eagle
- Rufous-bellied Helmetshrike
- Rufous-bellied Kookaburra
- Rufous-bellied Niltava
- Rufous-bellied Seedsnipe
- Rufous-bellied thrush
- Rufous-bellied Triller
- Rufous-bellied Woodpecker
- Rufous-breasted Accentor
- Rufous-breasted Bush Robin
- Rufous-breasted Chat-Tyrant
- Rufous-breasted Hermit
- Rufous-breasted Warbling Finch
- Rufous-breasted Wren
- Rufous-browed Hemispingus
- Rufous-browed Peppershrike
- Rufous-brown solitaire
- Rufous-capped babbler
- Rufous-capped Brush Finch
- Rufous-capped Warbler
- Rufous-cheeked Nightjar
- Rufous-cheeked Tanager
- Rufous-chinned Laughingthrush
- Rufous-collared sparrow
- Rufous-collared thrush
- Rufous-crowned Emu-wren
- Rufous-crowned Eremomela
- Rufous-crowned Greenlet
- Rufous-crowned Sparrow
- Rufous-crowned Tody-Flycatcher
- Rufous-eared Brush Finch
- Rufous-eared Warbler
- Rufous-faced Antbird
- Rufous-faced Antpitta
- Rufous-faced Warbler
- Rufous-fronted babbler
- Rufous-fronted Bushtit
- Rufous-fronted Laughingthrush
- Rufous-fronted Parakeet
- Rufous-fronted Prinia
- Rufous-gorgeted Flycatcher
- Rufous-headed Ground Roller
- Rufous-headed Parrotbill
- Rufous-headed Tanager
- Rufous-headed Woodpecker
- Rufous-naped Brush Finch
- Rufous-naped Lark
- Rufous-naped Tit
- Rufous-naped Wren
- Rufous-necked Hornbill
- Rufous-necked Laughingthrush
- Rufous-necked Snowfinch
- Rufous-necked Sparrowhawk
- Rufous-rumped Lark
- Rufous-sided Broadbill
- Rufous-sided Gerygone
- Rufous-sided Honeyeater
- Rufous-tailed Antbird
- Rufous-tailed Antthrush
- Rufous-tailed Attila
- Rufous-tailed Babbler
- Rufous-tailed Fantail
- Rufous-tailed Hawk
- Rufous-tailed Hummingbird
- Rufous-tailed Jacamar
- Rufous-tailed Lark
- Rufous-tailed Plantcutter
- Rufous-tailed Scrub Robin
- Rufous-throated Dipper
- Rufous-throated Flycatcher
- Rufous-throated Fulvetta
- Rufous-throated Honeyeater
- Rufous-throated Partridge
- Rufous-throated Sapphire
- Rufous-throated solitaire
- Rufous-throated Wren-Babbler
- Rufous-vented Chachalaca
- Rufous-vented ground cuckoo
- Rufous-vented Laughingthrush
- Rufous-vented Paradise Flycatcher
- Rufous-vented Prinia
- Rufous-vented Tapaculo
- Rufous-vented Tit
- Rufous-vented Whitetip
- Rufous-vented yuhina
- Rufous-webbed Brilliant
- Rufous-winged Antshrike
- Rufous-winged Buzzard
- Rufous-winged ground cuckoo
- Rufous-winged Sparrow
- Rufous-winged Sunbird
- Rufous Babbler
- Rufous Bristlebird
- Rufous Cisticola
- Rufous coucal
- Rufous Fantail
- Rufous Fieldwren
- Rufous Fishing Owl
- Rufous Flycatcher
- Rufous Gnateater
- Rufous Hornbill
- Rufous hornero
- Rufous Hummingbird
- Rufous Motmot
- Rufous Potoo
- Rufous Scrubbird
- Rufous Sibia
- Rufous Songlark
- Rufous Treecreeper
- Rufous Treepie
- Rufous Twistwing
- Rufous Vanga
- Rufous Whistler
- Rufous Woodpecker
- Rugezi Marsh
- Running coua
- Rüppell's Black Chat
- Rüppell's Parrot
- Rüppell's Vulture
- Rüppell's Warbler
- Rushworth Box-Ironbark Region
- Ruspoli's turaco
- Russell Balda
- Russell River National Park
- Russet-backed Jungle Flycatcher
- Russet-bellied Spinetail
- Russet-crowned Motmot
- Russet-crowned Warbler
- Russet-mantled Softtail
- Russet-tailed thrush
- Russet-throated Puffbird
- Russet-winged Schiffornis
- Russet Bush Warbler
- Russet nightingale-thrush
- Russet sparrow
- Rustic Bunting
- Rusty-backed Monjita
- Rusty-barred Owl
- Rusty-bellied Brush Finch
- Rusty-bellied Fantail
- Rusty-bellied Shortwing
- Rusty-breasted Nunlet
- Rusty-breasted Whistler
- Rusty-breasted Wren-Babbler
- Rusty-capped Fulvetta
- Rusty-cheeked Scimitar Babbler
- Rusty-crowned babbler
- Rusty-crowned Ground Sparrow
- Rusty-crowned Tit-Spinetail
- Rusty-faced Parrot
- Rusty-flanked Crake
- Rusty-flanked Treecreeper
- Rusty-fronted Barwing
- Rusty-fronted Canastero
- Rusty-headed Spinetail
- Rusty-margined Flycatcher
- Rusty-margined Guan
- Rusty-necked Piculet
- Rusty-tailed Flycatcher
- Rusty-throated Wren-Babbler
- Rusty-tinged Antpitta
- Rusty Blackbird
- Rusty Pitohui
- Rusty Sparrow
- Ruthven Deane
- Rutland Water
- Ruwenzori Batis
- Ruwenzori turaco
- Ruys' Bird of Paradise
- Rwenzori Mountains National Park
- Rye Meads nature reserve
- Ryonghung Gang estuary Important Bird Area
- Ryukyu Kingfisher
- Ryukyu Minivet
- Ryukyu robin
- Ryūkyū scops owl
- Ryukyu wood pigeon
- Sabine's gull
- Sabine's Puffback
- Sabine's Spinetail
- Sabota Lark
- Sacred Kingfisher
- Sad Flycatcher
- Saddle-billed Stork
- Saddleback (bird)
- Saddleback Point
- Saffron-cowled Blackbird
- Saffron-crested Tyrant-Manakin
- Saffron Finch
- Sagarmatha National Park
- Sage thrasher
- Sagebrush Sparrow
- Saginaw Bay
- Saint Croix macaw
- Saint Helena Shearwater
- Saint Lucia Amazon
- Saint Lucia Black Finch
- Saint Lucia Oriole
- Saint Lucia Warbler
- Saint Vincent Amazon
- Sakalava Rail
- Sakalava Weaver
- Saker Falcon
- Salikuit Islands
- Salim Ali Bird Sanctuary
- Salinas Monjita
- Salmon-crested Cockatoo
- Salt Marsh Common Yellowthroat
- Salton Sea
- Salvadori's Antwren
- Salvadori's Fig Parrot
- Salvadori's Nightjar
- Salvadori's Pheasant
- Salvadori's Seedeater
- Salvadori's teal
- Salvadorian Magpie
- Salvin's Albatross
- Salvin's Curassow
- Salvin's Prion
- Saman Sanctuary
- Samar Hornbill
- Samaspur Sanctuary
- Samoan Fantail
- Samoan Flycatcher
- Samoan Triller
- Samoan Whistler
- Samoan white-eye
- Samoan Woodhen
- Samuel Albert White
- Samuel Tickell
- Samuel Washington Woodhouse
- San Andres Vireo
- San Benedicto Rock Wren
- San Blas Jay
- San Clemente Loggerhead Shrike
- San Cristobal Mockingbird
- San Luis National Wildlife Refuge Complex
- Sand Lark
- Sand Martin
- Sand Partridge
- Sanderling
- Sandhill crane
- Sandi Bird Sanctuary
- Sandoy
- Sands of Forvie
- Sandstone shrikethrush
- Sandwell Valley
- Sandwell Valley RSPB reserve
- Sandwich tern
- Sandy Gallito
- Sandy Island (Lacepede Islands)
- Sandy Island (Windy Harbour)
- Sandy Island and Low Rock Important Bird Area
- Sandy scops owl
- Sandy Wollaston
- Sanford's Bowerbird
- Sanford's white-eye
- Sangihe Hanging Parrot
- Sangihe shrikethrush
- Sangihe white-eye
- Sanshuiornis
- Santa Cruz white-eye
- Santa Maria Goldcrest
- Santa Marta Antbird
- Santa Marta Antpitta
- Santa Marta Brush Finch
- Santa Marta Bush Tyrant
- Santa Marta Foliage-gleaner
- Santa Marta Mountain Tanager
- Santa Marta Parakeet
- Santa Marta Sabrewing
- Santa Marta Tapaculo
- Santa Marta Warbler
- Santa Marta Woodstar
- Santa Marta Wren
- Santarem Parakeet
- Sao Francisco Black Tyrant
- São Francisco Sparrow
- Sao Miguel Goldcrest
- São Paulo Marsh Antwren
- São Tomé Fiscal
- São Tomé Green Pigeon
- São Tomé Grosbeak
- São Tomé Kingfisher
- São Tomé Oriole
- São Tomé Paradise Flycatcher
- São Tomé Prinia
- São Tomé scops owl
- São Tomé Shorttail
- São Tomé Spinetail
- São Tomé thrush
- São Tomé Weaver
- São Tomé White-eye
- Sapayoa
- Sapeornis
- Sapphire-bellied Hummingbird
- Sapphire-spangled Emerald
- Sapphire Flycatcher
- Sarazm Important Bird Area
- Sardinian Warbler
- Sarus crane
- Satanic Nightjar
- Satin Bowerbird
- Satin Flycatcher
- Satyr Tragopan
- Saunders's Gull
- Saunders's Tern
- Saunders Island, Falkland Islands
- Savanna Hawk
- Savanna Nightjar
- Savannah sparrow
- Savi's Warbler
- Saw-billed Hermit
- Saxaul sparrow
- Sayaca Tanager
- Saziley National Park
- Scale-backed Antbird
- Scale-feathered malkoha
- Scale-throated Hermit
- Scaled Antbird
- Scaled Chachalaca
- Scaled ground cuckoo
- Scaled quail
- Scaled Spinetail
- Scaled Woodcreeper
- Scallop-breasted Antpitta
- Scalloped Antbird
- Scaly-bellied Woodpecker
- Scaly-breasted Honeyeater
- Scaly-breasted Kingfisher
- Scaly-breasted Lorikeet
- Scaly-breasted munia
- Scaly-breasted Thrasher
- Scaly-breasted Wren
- Scaly-breasted Wren-babbler
- Scaly-crowned Honeyeater
- Scaly-feathered Weaver
- Scaly-headed Parrot
- Scaly-naped Pigeon
- Scaly-throated Leaftosser
- Scaly Francolin
- Scaly Ground Roller
- Scaly Laughingthrush
- Scaly thrush
- Scaniornis
- Scarce Swift
- Scarlet-backed Flowerpecker
- Scarlet-banded Barbet
- Scarlet-breasted Fruit Dove
- Scarlet-chested Parrot
- Scarlet-chested Sunbird
- Scarlet-collared Flowerpecker
- Scarlet-crowned Barbet
- Scarlet-faced Liocichla
- Scarlet-headed Blackbird
- Scarlet-headed Flowerpecker
- Scarlet-hooded Barbet
- Scarlet-rumped Cacique
- Scarlet-rumped Trogon
- Scarlet-throated Tanager
- Scarlet-tufted Sunbird
- Scarlet Finch
- Scarlet ibis
- Scarlet Macaw
- Scarlet Minivet
- Scarlet Myzomela
- Scarlet robin
- Scarlet Tanager
- Scarlett's Duck
- Scarlett's shearwater
- Scenic Rim
- Schaalsee Biosphere Reserve
- Schlegel's Asity
- Schlegel's Francolin
- Schneider's Pitta
- Schodde's Bird of Paradise
- Schouteden's Swift
- Scimitar-winged Piha
- Scintillant Hummingbird
- Scissor-billed Koa Finch
- Scissor-tailed Flycatcher
- Scissor-tailed kite
- Scissor-tailed Nightjar
- Sclater's Monal
- Sclater's Myzomela
- Scotia Sanctuary
- Scott's Oriole
- Scott Barchard Wilson
- Scott Inlet
- Scottish Crossbill
- Scottish Ornithologists' Club
- Screaming Piha
- Scripps's murrelet
- Scrub Island, Anguilla
- Scrubbird
- Scrubtit
- Sea Cow Island
- Sea Duck Joint Venture
- Sea Lion Island
- Seabird Colony Register
- Seagull Island (Tiwi Islands)
- Seagull Lake
- Seal Bay, Falkland Islands
- Seal Islands (South Shetland Islands)
- Seaside Sparrow
- Seattle Audubon Society
- Secretarybird
- Sedge Warbler
- Sedge Wren
- See-see Partridge
- Seicercus
- Seller's Wood
- Selva Cacique
- Semicollared Flycatcher
- Semipalmated plover
- Semipalmated sandpiper
- Semper's Warbler
- Semuliki National Park
- Senegal Batis
- Senegal coucal
- Senegal Eremomela
- Senegal Parrot
- Senegal Thick-knee
- Seney National Wildlife Refuge
- Sennar Penduline Tit
- Sepia-brown Wren
- Seram Friarbird
- Seram Golden Bulbul
- Seram Honeyeater
- Seram Imperial Pigeon
- Seram Masked Owl
- Seram Mountain Pigeon
- Seram thrush
- Seram white-eye
- Serama
- Serendib scops owl
- Seriema
- Serra Antwren
- Serra do Mar Tyrannulet
- Serra do Mar Tyrant-Manakin
- Serra do Pico da Antónia Important Bird Area
- Serra Finch
- Serranía de las Quinchas
- Sespe Condor Sanctuary
- Seven-coloured Tanager
- Seychelles Black Parrot
- Seychelles blue pigeon
- Seychelles Bulbul
- Seychelles Fody
- Seychelles Kestrel
- Seychelles Magpie-Robin
- Seychelles Paradise Flycatcher
- Seychelles Parakeet
- Seychelles scops owl
- Seychelles Sunbird
- Seychelles Swiftlet
- Seychelles Warbler
- Seychelles White-eye
- Seymour Island (Nunavut)
- Shaft-tailed Whydah
- Shag Reef
- Shaheen Falcon
- Shallow Inlet
- Shane A. Parker
- Shanks Islands
- Shanweiniao
- Shapwick Heath
- Shapwick Moor
- Shapwick, Somerset
- Sharp-beaked Ground Finch
- Sharp-billed Canastero
- Sharp-shinned hawk
- Sharp-tailed grouse
- Sharp-tailed sandpiper
- Sharpbill
- Sharpe's Lobe-billed Parotia
- Sharpe's Longclaw
- Sharpe's Rail
- Sharpham
- Sharpham Moor Plot
- Shellback Island
- Shelley's Crimsonwing
- Shelley's Eagle-Owl
- Shelley's francolin
- Shelley's Oliveback
- Shelley's Sparrow
- Shenqiornis
- Shepody Bay
- Shetland Goose
- Shiant Isles
- Shikra
- Shining-blue Kingfisher
- Shining bronze cuckoo
- Shining drongo
- Shining Honeycreeper
- Shining parrot
- Shiny Cowbird
- Shiny Whistling Thrush
- Shoal Bay (Darwin)
- Shoalwater Bay
- Shoebill
- Shore Dotterel
- Short-bearded Melidectes
- Short-billed dowitcher
- Short-billed Miner
- Short-billed Pigeon
- Short-billed Pipit
- Short-crested Coquette
- Short-crested Monarch
- Short-eared Owl
- Short-legged Ground Roller
- Short-tailed Emerald
- Short-tailed Frogmouth
- Short-tailed Grasswren
- Short-tailed hawk
- Short-tailed Paradigalla
- Short-tailed Parrot
- Short-tailed Parrotbill
- Short-tailed Pipit
- Short-tailed Pygmy Tyrant
- Short-tailed Scimitar Babbler
- Short-tailed shearwater
- Short-tailed Swift
- Short-toed snake eagle
- Short-toed Treecreeper
- Short-winged Cisticola
- Shovel-billed Kookaburra
- Shrike-like Laniisoma
- Shrike-like Tanager
- Shy albatross
- Shy Heathwren
- Siamese Fireback
- Siau scops owl
- Siberian Accentor
- Siberian Blue Robin
- Siberian Jay
- Siberian Rubythroat
- Siberian Stonechat
- Siberian thrush
- Sibsey Island
- Sichuan Jay
- Sichuan Treecreeper
- Sick's Swift
- Sickle-billed Vanga
- Sickle-winged Chat
- Sickle-winged Guan
- Sidamo Lark
- Sidmouth Rock
- Sidney Dillon Ripley
- Sidney William Jackson
- Sierra Madre Ground Warbler
- Sierra Nevada Brush Finch
- Signy Island
- Sikkim Treecreeper
- Sikkim wedge-billed babbler
- Silhouette Island
- Silktail
- Sillem's Mountain Finch
- Silver-backed Butcherbird
- Silver-backed Needletail
- Silver-beaked Tanager
- Silver-breasted Broadbill
- Silver-capped Fruit Dove
- Silver-crowned Friarbird
- Silver-eared Honeyeater
- Silver-eared Laughingthrush
- Silver-eared Mesia
- Silver-throated Bushtit
- Silver-throated Tanager
- Silver-tipped Imperial Pigeon
- Silver Appleyard Duck
- Silver Gull
- Silver Oriole
- Silver Pheasant
- Silverbird (bird)
- Silvereye
- Silvery-breasted Tanager
- Silvery-cheeked Antshrike
- Silvery-cheeked Hornbill
- Silvery-throated Spinetail
- Silvery Kingfisher
- Silvester Diggles
- Simeulue scops owl
- Simple Greenbul
- Simpson Desert Important Bird Area
- Sinaloa crow
- Sinaloa Martin
- Sinaloa Wren
- Sincorá Antwren
- Sind Sparrow
- Sind Woodpecker
- Singing Bush Lark
- Singing Cisticola
- Singing Honeyeater
- Singing Starling
- Sinharaja Forest Reserve
- Sinornis
- Sinoto's Lorikeet
- Sir Hugh Elliott, 3rd Baronet
- Sir Joseph Banks Group
- Sir William Jardine, 7th Baronet
- Sira Barbet
- Sira Curassow
- Sira Tanager
- Sirkeer malkoha
- Sisters Island (Queensland)
- Sjöstedt's Barred Owlet
- Sjöstedt's Greenbul
- Skagen Odde
- Skilling Island
- Skorpa Bird Sanctuary
- Skúvoy
- Slate-colored Boubou
- Slate-colored Fox Sparrow
- Slate-coloured Hawk
- Slate-coloured solitaire
- Slate-throated Whitestart
- Slaty-backed Chat-Tyrant
- Slaty-backed Flycatcher
- Slaty-backed Forktail
- Slaty-backed Hemispingus
- Slaty-backed Jungle Flycatcher
- Slaty-backed nightingale-thrush
- Slaty-backed Thornbill
- Slaty-backed thrush
- Slaty-bellied Tesia
- Slaty-blue Flycatcher
- Slaty-breasted Rail
- Slaty-capped Shrike-Vireo
- Slaty-headed Parakeet
- Slaty-legged Crake
- Slaty-mantled Goshawk
- Slaty-tailed Trogon
- Slaty Bunting
- Slaty Cuckooshrike
- Slaty egret
- Slaty Monarch
- Sleeping Bear Dunes National Lakeshore
- Slender-billed Babbler
- Slender-billed Cuckoo-Dove
- Slender-billed curlew
- Slender-billed Flufftail
- Slender-billed Grackle
- Slender-billed Gull
- Slender-billed Kite
- Slender-billed Oriole
- Slender-billed Parakeet
- Slender-billed Prion
- Slender-billed Thornbill
- Slender-billed Vulture
- Slender-billed Weaver
- Slender-footed Tyrannulet
- Slender-tailed Nightjar
- Slender Antbird
- Small-billed Moa-nalo
- Small Ground Finch
- Small Lifou white-eye
- Small Minivet
- Small Niltava
- Small Pratincole
- Small Tree Finch
- Smew
- Smith's Longspur
- Smithsonian Migratory Bird Center
- Smoky Robin
- Smoky Warbler
- Smooth-billed ani
- Snail kite
- Snares Penguin
- Snares Snipe
- Snettisham RSPB reserve
- Snipe-rail
- Snoring rail
- Snow bunting
- Snow goose
- Snow Hill Island
- Snow Mountains Quail
- Snow Mountains Robin
- Snow Partridge
- Snow petrel
- Snow pigeon
- Snowcap
- Snowy-bellied Hummingbird
- Snowy-browed Flycatcher
- Snowy-cheeked Laughingthrush
- Snowy-crowned Robin-Chat
- Snowy-throated babbler
- Snowy egret
- Snowy owl
- Snowy plover
- Snowy Sheathbill
- Sociable Lapwing
- Society for the Conservation and Study of Caribbean Birds
- Society Kingfisher
- Society Parakeet
- Socorro Dove
- Socorro Mockingbird
- Socorro Parakeet
- Socorro Wren
- Socotra Bunting
- Socotra Buzzard
- Socotra Cisticola
- Socotra Cormorant
- Socotra Golden-winged Grosbeak
- Socotra Sparrow
- Socotra Starling
- Socotra Sunbird
- Socotra Warbler
- Sogam-do, Daegam-do, Zung-do, Ae-do and Hyengzedo Islands Important Bird Area
- Sokoke Pipit
- Solander Islands
- Solitary sandpiper
- Solitary snipe
- Solling-Vogler Nature Park
- Solomons boobook
- Solomons Cuckooshrike
- Solomons Frogmouth
- Solomons white-eye
- Solomons White Ibis
- Somali Boubou
- Somali Crombec
- Somali crow
- Somali Fiscal
- Somali Lark
- Somali pigeon
- Somali Sparrow
- Somali thrush
- Sombre Greenbul
- Sombre Kingfisher
- Sombre Nightjar
- Sombre pigeon
- Sombre Tit
- Sombrero, Anguilla
- Somerset Levels
- Somerton
- Song Parrot
- Song Sparrow
- Song thrush
- Songar Tit
- Sooretama Slaty Antshrike
- Sooty-capped Bush Tanager
- Sooty-capped Hermit
- Sooty-capped Puffbird
- Sooty Ant Tanager
- Sooty babbler
- Sooty Barbthroat
- Sooty Bushtit
- Sooty Chat
- Sooty Falcon
- Sooty Flycatcher
- Sooty grouse
- Sooty Gull
- Sooty Myzomela
- Sooty Oystercatcher
- Sooty shearwater
- Sooty tern
- Sooty thrush
- Sooty Woodpecker
- Sør-Spitsbergen National Park
- Sora (bird)
- Søraust-Svalbard Nature Reserve
- Sørkapp Bird Sanctuary
- Souimanga Sunbird
- South-east Tasmania Important Bird Area
- South-west Saint Helena Important Bird Area
- South African Shelduck
- South American Painted-snipe
- South American snipe
- South American Tern
- South Arm Important Bird Area
- South Australian Ornithological Association
- South Australian Ornithologist
- South Barnard Islands Important Bird Area
- South Brother (Chagos Bank)
- South Channel Fort
- South East Forests National Park
- South East Island
- South East Mutton Bird Islet
- South Georgia and the South Sandwich Islands
- South Georgia Diving Petrel
- South Georgia Pintail
- South Georgia Pipit
- South Georgia Shag
- South Island giant moa
- South Island Oystercatcher
- South Island piopio
- South Island snipe
- South Polar skua
- South Soufriere Hills
- South Stack Cliffs RSPB reserve
- South Uist
- South West Mutton Bird Islet
- South West Slopes
- Southeastern Arizona Bird Observatory
- Southern Antpipit
- Southern Beardless Tyrannulet
- Southern Black Flycatcher
- Southern Black Korhaan
- Southern Boobook
- Southern Boubou
- Southern Carmine Bee-eater
- Southern crested caracara
- Southern Crowned Pigeon
- Southern Double-collared Sunbird
- Southern Emu-wren
- Southern Fiscal
- Southern Fulmar
- Southern Giant Petrel
- Southern Grey-headed Sparrow
- Southern Grey Shrike
- Southern Ground Hornbill
- Southern Hemisphere Ornithological Congress
- Southern Hill Myna
- Southern Hyliota
- Southern James Bay
- Southern Lapwing
- Southern Masked Weaver
- Southern Moreton Bay Islands National Park
- Southern Nightingale-Wren
- Southern NSW Mallee Important Bird Area
- Southern Oceans Seabird Study Association
- Southern Powell Island and adjacent islets Specially Protected Area
- Southern Red Bishop
- Southern Rockhopper Penguin
- Southern Rough-winged Swallow
- Southern Royal Albatross
- Southern Scrub Robin
- Southern South American Migratory Grassland Bird Species Memorandum of Understanding
- Southern Tchagra
- Southern White-crowned Shrike
- Southern white-faced owl
- Southern Whiteface
- Southern Yellow-billed Hornbill
- Southern Yorke Peninsula Important Bird Area
- Southlake Moor
- Southwest Bylot Plain
- Souza's Shrike
- Sowy River
- Spangled Coquette
- Spangled Cotinga
- Spangled drongo
- Spangled Honeyeater
- Spangled Kookaburra
- Spanish imperial eagle
- Spanish Sparrow
- Sparkling Violetear
- Sparrowhawk Hill
- Speckle-breasted Woodpecker
- Speckle-chested Piculet
- Speckle-faced Parrot
- Speckle-fronted Weaver
- Speckled Boobook
- Speckled Chachalaca
- Speckled Hummingbird
- Speckled Mousebird
- Speckled Piculet
- Speckled pigeon
- Speckled Tinkerbird
- Speckled Warbler
- Speckled wood pigeon
- Spectacled Bulbul
- Spectacled Cormorant
- Spectacled Finch
- Spectacled Flowerpecker
- Spectacled Imperial Pigeon
- Spectacled Owl
- Spectacled Parrotbill
- Spectacled petrel
- Spectacled thrush
- Spectacled Warbler
- Spectacled Weaver
- Speedwell Island
- Spencer Fullerton Baird
- Spencer Gulf Important Bird Area
- Spences Reefs
- Spice Imperial Pigeon
- Spindalis
- Spinifex Pigeon
- Spinifexbird
- Spiny-cheeked Honeyeater
- Spiny Babbler
- Spit Nature Conservation Reserve
- Spix's macaw
- Spix's Warbling Antbird
- Spix's Woodcreeper
- Splendid Astrapia
- Splendid fairywren
- Splendid Starling
- Splendid Sunbird
- Spoon-billed sandpiper
- Spot-backed Antbird
- Spot-backed Puffbird
- Spot-bellied Bobwhite
- Spot-bellied Eagle-Owl
- Spot-billed duck
- Spot-billed pelican
- Spot-billed Toucanet
- Spot-breasted heleia
- Spot-breasted Ibis
- Spot-breasted Lapwing
- Spot-breasted Laughingthrush
- Spot-breasted Oriole
- Spot-breasted Parrotbill
- Spot-breasted Scimitar Babbler
- Spot-breasted Woodpecker
- Spot-crowned Euphonia
- Spot-crowned Woodcreeper
- Spot-flanked Gallinule
- Spot-necked Bulbul
- Spot-tailed Sparrowhawk
- Spot-throated Babbler
- Spot-throated Flameback
- Spot-throated Hummingbird
- Spot-winged Antbird
- Spot-winged Falconet
- Spot-winged Grosbeak
- Spot-winged Rosefinch
- Spot-winged Starling
- Spot-winged thrush
- Spotless Crake
- Spotted Antbird
- Spotted Bowerbird
- Spotted Bush Warbler
- Spotted Buttonquail
- Spotted Catbird
- Spotted Crake
- Spotted Crocias
- Spotted Dove
- Spotted Flycatcher
- Spotted Forktail
- Spotted Greenbul
- Spotted ground thrush
- Spotted Harrier
- Spotted Honeyguide
- Spotted Imperial Pigeon
- Spotted Laughingthrush
- Spotted nightingale-thrush
- Spotted Nightjar
- Spotted Nutcracker
- Spotted owl
- Spotted Owlet
- Spotted Pardalote
- Spotted Piculet
- Spotted Quail-thrush
- Spotted redshank
- Spotted sandgrouse
- Spotted sandpiper
- Spotted shag
- Spotted Thick-knee
- Spotted Thrush-Babbler
- Spotted Tody-Flycatcher
- Spotted Towhee
- Spotted Wood Kingfisher
- Spotted Wren
- Spotted Wren-Babbler
- Sprague's Pipit
- Spring Bay, Ontario
- Springbrook National Park
- Spur-winged Goose
- Spur-winged Lapwing
- Spurn
- Squacco heron
- Squamate Antbird
- Square-tailed drongo
- Square-tailed drongo-cuckoo
- Square-tailed Kite
- Square-tailed Nightjar
- Square-tailed Saw-wing
- Squatter Pigeon
- Squirrel cuckoo
- Sri Lanka Blue Magpie
- Sri Lanka Bush Warbler
- Sri Lanka drongo
- Sri Lanka Frogmouth
- Sri Lanka Grey Hornbill
- Sri Lanka Hanging Parrot
- Sri Lanka Hill Myna
- Sri Lanka Junglefowl
- Sri Lanka Scimitar Babbler
- Sri Lanka Spurfowl
- Sri Lanka thrush
- Sri Lanka whistling thrush
- Sri Lanka White-eye
- Sri Lanka wood pigeon
- St Aidan's
- St Arnaud Box-Ironbark Region
- St Francis Island
- St Helena Island National Park
- St Helens Important Bird Area
- St Helens Island
- St John Philby
- St Kilda, Scotland
- St Peter Island
- St. Joseph River (Lake Michigan)
- Staaten River National Park
- Stack Island
- Stamford Raffles
- Standard-winged Nightjar
- Standardwing
- Stanley Cobb
- Stanley Cramp
- Stanley Temple
- Stapleton Island
- Star-throated Antwren
- Star Finch
- Starry Owlet-nightjar
- Stawell, Somerset
- Steel-blue Whydah
- Steely-vented Hummingbird
- Steep Island
- Steere's Liocichla
- Steinbach's Canastero
- Stejneger's Stonechat
- Steller's Jay
- Steller's sea eagle
- Stephen Davies (ornithologist)
- Stephen Marchant
- Stephen Moss
- Stephens Island (Great Barrier Reef)
- Stephens Island wren
- Steppe Eagle
- Steve Gantlett
- Stierling's Wren-Warbler
- Stigant Point
- Stiles's Tapaculo
- Stilt-owl
- Stilt sandpiper
- Stinker Point
- Stirling Range
- Stirling Range National Park
- Stitchbird
- Stock dove
- Stockland Bristol
- Stoke St Gregory
- Stoltenhoff Island
- Stone Partridge
- Stonington Island
- Stóra Dímun
- Storehouse Island
- Stork-billed Kingfisher
- Storm's Stork
- Storrs L. Olson
- Stour Estuary RSPB reserve
- Stout-legged Finch
- Stout-legged wren
- Stout Cisticola
- Straight-billed Hermit
- Straight-billed Reedhaunter
- Straight-billed Woodcreeper
- Strait of Gibraltar
- Straneck's Tyrannulet
- Strange-tailed Tyrant
- Strange Weaver
- Strangford Lough
- Straw-necked Ibis
- Straw-tailed Whydah
- Streak-backed Oriole
- Streak-breasted Bulbul
- Streak-breasted Fantail
- Streak-breasted Honeyeater
- Streak-breasted Jungle Flycatcher
- Streak-breasted Scimitar Babbler
- Streak-breasted Woodpecker
- Streak-capped Spinetail
- Streak-headed Antbird
- Streak-headed mannikin
- Streak-headed white-eye
- Streak-throated Barwing
- Streak-throated Hermit
- Streak-throated swallow
- Streak-throated Woodpecker
- Streaked Bowerbird
- Streaked Fantail
- Streaked Flycatcher
- Streaked Laughingthrush
- Streaked Rosefinch
- Streaked Scrub Warbler
- Streaked shearwater
- Streaked Spiderhunter
- Streaked Tuftedcheek
- Streaked Weaver
- Streaked Wren-Babbler
- Streaky-breasted Flufftail
- Streaky-headed Seedeater
- Street Heath
- Stresemann's Bird of Paradise
- Stresemann's Bristlefront
- Streymoy
- Striated Antbird
- Striated Babbler
- Striated Bulbul
- Striated Caracara
- Striated Earthcreeper
- Striated Fieldwren
- Striated Grassbird
- Striated Grasswren
- Striated heron
- Striated Laughingthrush
- Striated Lorikeet
- Striated Pardalote
- Striated Prinia
- Striated Softtail
- Striated Starling
- Striated Swallow
- Striated Thornbill
- Striated Wren-Babbler
- Striated yuhina
- Strickland's Woodpecker
- Striolated Bunting
- Striolated Puffbird
- Striolated Tit-Spinetail
- Stripe-backed Wren
- Stripe-breasted Rhabdornis
- Stripe-breasted Starthroat
- Stripe-breasted Tit
- Stripe-breasted Woodpecker
- Stripe-capped Sparrow
- Stripe-cheeked Woodpecker
- Stripe-faced Wood Quail
- Stripe-headed Rhabdornis
- Stripe-headed Sparrow
- Stripe-tailed Hummingbird
- Stripe-tailed Yellow Finch
- Stripe-throated Hermit
- Stripe-throated jery
- Stripe-throated yuhina
- Striped Crake
- Striped cuckoo
- Striped Flowerpecker
- Striped honeyeater
- Striped Kingfisher
- Striped Laughingthrush
- Striped owl
- Striped Pipit
- Striped Sparrow
- Striped Woodpecker
- Strong-billed Honeyeater
- Strumpshaw Fen RSPB reserve
- Struthio coppensi
- Struthio dmanisensis
- Struthio linxiaensis
- Struthio orlovi
- Struthio wimani
- Strzelecki Desert Lakes Important Bird Area
- Stuart Keith
- Stubble Quail
- Stuhlmann's Starling
- Styan's Bulbul
- Subalpine Warbler
- Subantarctic snipe
- Suchindram Theroor Birds Sanctuary
- Sudan Golden Sparrow
- Sudbury Reef
- Süderoog
- Suðuroy
- Sugarbird
- Sugarloaf Rock (Mutton Bird Group)
- Sugarmouse Island
- Suiriri Flycatcher
- Sula Cicadabird
- Sula Hanging Parrot
- Sula Pitta
- Sula scops owl
- Sula Sgeir
- Sulawesi Babbler
- Sulawesi Blue Flycatcher
- Sulawesi Cicadabird
- Sulawesi cuckoo
- Sulawesi drongo
- Sulawesi Dwarf Kingfisher
- Sulawesi Goshawk
- Sulawesi Ground Dove
- Sulawesi Hawk-Eagle
- Sulawesi Hornbill
- Sulawesi Masked Owl
- Sulawesi mountain-thrush
- Sulawesi Myna
- Sulawesi Myzomela
- Sulawesi Nightjar
- Sulawesi Pygmy Woodpecker
- Sulawesi serpent eagle
- Sulawesi thrush
- Sulawesi woodcock
- Sule Skerry
- Sule Stack
- Sulphur-bellied Bulbul
- Sulphur-bellied Flycatcher
- Sulphur-bellied Warbler
- Sulphur-billed Nuthatch
- Sulphur-breasted Myzomela
- Sulphur-breasted Parakeet
- Sulphur-crested Cockatoo
- Sulphur-vented Whistler
- Sulphur-winged Parakeet
- Sulphury Flycatcher
- Sultan Tit
- Sultanpur National Park
- Sulu bleeding-heart
- Sulu Hawk-Owl
- Sulu Hornbill
- Sulu Pygmy Woodpecker
- Sumatran Babbler
- Sumatran cochoa
- Sumatran drongo
- Sumatran Green Pigeon
- Sumatran ground cuckoo
- Sumatran laughingthrush
- Sumatran Leafbird
- Sumatran Treepie
- Sumatran Trogon
- Sumatran Wren-Babbler
- Sumba Boobook
- Sumba Brown Flycatcher
- Sumba Buttonquail
- Sumba Flycatcher
- Sumba Green Pigeon
- Sumba Hornbill
- Sumba Myzomela
- Sumburgh Head
- Sumichrast's Wren
- Summer Leys
- Summer Tanager
- Sun Lark
- Sun Parakeet
- Sunbird
- Sunbittern
- Suncoast Seabird Sanctuary
- Sunda Bulbul
- Sunda coucal
- Sunda cuckoo
- Sunda Forktail
- Sunda Minivet
- Sunda Robin
- Sunda Teal
- Sunda thrush
- Sunday Island (Exmouth Gulf)
- Sungai Clere Important Bird Area
- Sungei Buloh Wetland Reserve
- Sungrebe
- Sunset Lorikeet
- Superb Bird-of-paradise
- Superb fairywren
- Superb Fruit Dove
- Superb Lyrebird
- Superb Parrot
- Superb Pitta
- Superb Starling
- Surf scoter
- Surfbird
- Surlingham Church Marsh RSPB reserve
- Surucua Trogon
- Sussex Ornithological Society
- Svínoy
- Swahili Sparrow
- Swain Reefs National Park
- Swainson's hawk
- Swainson's Sparrow
- Swainson's thrush
- Swainson's Warbler
- Swainson Island
- Swallow-tailed Bee-eater
- Swallow-tailed cotinga
- Swallow-tailed gull
- Swallow-tailed Hummingbird
- Swallow-tailed kite
- Swallow-winged Puffbird
- Swallow Tanager
- Swamp Boubou
- Swamp Flycatcher
- Swamp Francolin
- Swamp harrier
- Swamp Nightjar
- Swamp palm bulbul
- Swamp Prinia
- Swan Bay
- Swan Bay and Port Phillip Bay Islands Important Bird Area
- Swan Goose
- Swan Island (Tasmania)
- Swan Island (Victoria)
- Swan Island, County Antrim
- Swan River Honeyeater
- Swee Waxbill
- Swift Parrot
- Swinhoe's Pheasant
- Swinhoe's Rail
- Swinhoe's snipe
- Swinhoe's Storm Petrel
- Switha
- Sword-billed Hummingbird
- Sykes's Lark
- Sykes's Nightjar
- Sykes's Warbler
- Sylviornis
- Syrian Woodpecker
- Szechenyi's Monal-Partridge
- T. J. Roberts
- Ta'Cenc Cliffs Important Bird Area
- Tabusintac Lagoon and River Estuary
- Tacarcuna Bush Tanager
- Tacazze Sunbird
- Táchira Emerald
- Taedong River estuary Important Bird Area
- Tagula Butcherbird
- Tagula Honeyeater
- Tagula White-eye
- Tahiti Crake
- Tahiti Monarch
- Tahiti Rail
- Tahiti Sandpiper
- Tahiti Swiftlet
- Tahuata Rail
- Taiga Flycatcher
- Taita Apalis
- Taita Fiscal
- Taita thrush
- Taiwan Barwing
- Taiwan Blue Magpie
- Taiwan Bush Warbler
- Taiwan fulvetta
- Taiwan Hwamei
- Taiwan Partridge
- Taiwan Scimitar Babbler
- Taiwan Thrush
- Taiwan Whistling Thrush
- Taiwan Wren-babbler
- Taiwan yuhina
- Takahē
- Tal Chhapar Sanctuary
- Talaud Bush-hen
- Talaud Kingfisher
- Talaud Rail
- Taliabu Masked Owl
- Tam O'Shanter Point
- Tamar–Tavy Estuary
- Tamar River Conservation Area
- Tamar Wetlands Important Bird Area
- Tamaulipas crow
- Tamaulipas pygmy owl
- Tamborine Mountain
- Tambourine Dove
- Tanah Jampea
- Tanimbar Corella
- Tanimbar Megapode
- Tanimbar Oriole
- Tanimbar Starling
- Tanjung Tuan
- Tanna Fruit Dove
- Tanna Ground Dove
- Tapaculo
- Tapajós Hermit
- Tarcutta Hills Reserve
- Tarrabool Lake
- Tarrabool Lake – Eva Downs Swamp System
- Tartar Island
- Tasitolu
- Tasman Booby
- Tasman Island
- Tasman National Park
- Tasman Peninsula
- Tasman Starling
- Tasmanian Masked Owl
- Tasmanian Nativehen
- Tasmanian Scrubwren
- Tasmanian Thornbill
- Tasmanian Wedge-tailed Eagle
- Tatamailau
- Tawas Point State Park
- Tawitawi Brown Dove
- Tawny-backed Fantail
- Tawny-bellied Babbler
- Tawny-bellied Hermit
- Tawny-breasted Parrotfinch
- Tawny-breasted Wren-Babbler
- Tawny-crowned Honeyeater
- Tawny-flanked Prinia
- Tawny-winged Woodcreeper
- Tawny Eagle
- Tawny Fish Owl
- Tawny Frogmouth
- Tawny owl
- Tawny Piculet
- Tawny Pipit
- Tealham and Tadham Moors
- Teardrop white-eye
- Telineelapuram and Telukunchi Bird Sanctuaries
- Temminck's Courser
- Temminck's Lark
- Temminck's stint
- Temminck's Sunbird
- Temminck's Tragopan
- Tenerife Goldcrest
- Tennessee Ornithological Society
- Tepui Foliage-gleaner
- Teratornis
- Terek sandpiper
- Tessmann's Flycatcher
- Teviornis
- Thambetochen
- Thane Creek
- Thattekad Bird Sanctuary
- Thayer's gull
- The Birds of America
- The Bluff (Cayman Islands)
- The Coffee Pot (Tasmania)
- The Finch Society of Australia
- The Hummingbird Society
- The Institute for Bird Populations
- The Lakes Important Bird Area
- The Lodge RSPB reserve
- The Oa
- The Pyramid
- The Raptor Trust
- The Sisters (New Zealand)
- The Skerries, Isle of Anglesey
- The State of Australia's Birds
- The Swale
- The Thumbs (Tasmania)
- The Wash
- Thekla Lark
- Theodore A. Parker III
- Thick-billed cuckoo
- Thick-billed Flowerpecker
- Thick-billed Grasswren
- Thick-billed Green Pigeon
- Thick-billed Ground Dove
- Thick-billed heleia
- Thick-billed Honeyguide
- Thick-billed Kingbird
- Thick-billed Lark
- Thick-billed Miner
- Thick-billed murre
- Thick-billed Parrot
- Thick-billed raven
- Thick-billed Seedeater
- Thick-billed Vireo
- Thick-billed Warbler
- Thick-billed Weaver
- Thol Lake
- Thomas Algernon Smith-Dorrien-Smith
- Thomas Barwick Lloyd Baker
- Thomas Bellerby Wilson
- Thomas Bewick
- Thomas C. Jerdon
- Thomas Campbell Eyton
- Thomas Coward
- Thomas Davies (British Army officer)
- Thomas Gilbert Pearson
- Thomas Horsfield
- Thomas Jeffery Parker
- Thomas Mayo Brewer
- Thomas Nuttall
- Thomas Pennant
- Thomas Powys, 4th Baron Lilford
- Thomas Richard Heywood Thomson
- Three-banded Plover
- Three-toed Jacamar
- Three-toed Parrotbill
- Three-wattled Bellbird
- Three Hummock Island
- Three Hummocks Islands
- Three Sisters Important Bird Area
- Thrush-like Mourner
- Thrush-like Wren
- Thrush Nightingale
- Thure Kumlien
- Thyolo alethe
- Tibetan Babax
- Tibetan blackbird
- Tibetan Bunting
- Tibetan Lark
- Tibetan Partridge
- Tibetan sandgrouse
- Tibetan Serin
- Tibetan Snowcock
- Tibetan Snowfinch
- Tickell's Blue Flycatcher
- Tickell's Brown Hornbill
- Tickell's Leaf Warbler
- Tickell's thrush
- Tiger Shrike
- Tigrovaya Balka Nature Reserve
- Tilomar Important Bird Area
- Tim Gallagher
- Timneh Parrot
- Timor Blue Flycatcher
- Timor Bush Warbler
- Timor Friarbird
- Timor Green Pigeon
- Timor Imperial Pigeon
- Timor Leaf Warbler
- Timor sparrow
- Timor Stubtail
- Tin Kettle Island
- Tinaminae
- Tiny Hawk
- Tiny Sunbird
- Tit-like Dacnis
- Tit Berrypecker
- Tit Hylia
- Titanis
- Titanohierax
- Titchwell Marsh
- Titi / Muttonbird Islands
- Titian Peale
- Titicaca Grebe
- Tiwai Point
- Tiwi Islands
- Toco Toucan
- Tocuyo Sparrow
- Todd's Nightjar
- Tody
- Together for Trees
- Togian Boobook
- Togian white-eye
- Togo Paradise Whydah
- Tolima Dove
- Tom Harrisson
- Tom Iredale
- Tommy Garnett
- Tomtit
- Tongan Whistler
- Tongatapu Rail
- Tony Norris
- Tony Silva
- Tony Soper
- Tooth-billed Bowerbird
- Tooth-billed Hummingbird
- Tooth-billed Pigeon
- Topknot Pigeon
- Torgersen Island
- Torotoroka scops owl
- Torrent Duck
- Torresian crow
- Toucan
- Toucan Barbet
- Tourville and Murat Bays Important Bird Area
- Towerrining Lake and Moodiarrup Swamps Important Bird Area
- Townsend's shearwater
- Townsend's solitaire
- Townsend's Warbler
- Tractrac Chat
- Tragopan
- Transvolcanic jay
- Traprock Important Bird Area
- Tree Martin
- Tree Pipit
- Tree Swallow
- Trefoil Island
- Trembler
- Treshnish Isles
- Trevor Pescott
- Tri-State Bird Rescue and Research
- Trias Greenfinch
- Tribonyx
- Tricolored Blackbird
- Tricolored heron
- Tricolored Parrotfinch
- Tricoloured munia
- Trindade petrel
- Trinidad Piping Guan
- Trinity Island
- Tristan da Cunha
- Tristram's Bunting
- Tristram's storm petrel
- Tristram's Woodpecker
- Trocaz pigeon
- Trochilus
- Tromelin Island
- Tropeiro Seedeater
- Tropical boubou
- Tropical Gnatcatcher
- Tropical Kingbird
- Tropical Mockingbird
- Tropical Parula
- Tropical Screech Owl
- Troubridge Island
- Trumland
- Trumpet Manucode
- Trumpeter (bird)
- Trumpeter Finch
- Trumpeter Hornbill
- Trumpeter Islets
- Tryon Island
- Tschudi's Tapaculo
- Tschudi's Woodcreeper
- Tsingy Wood Rail
- Tuamotu Kingfisher
- Tuamotu sandpiper
- Tubuai Rail
- Tucson Bird Count
- Tucumán Amazon
- Tucumán Mountain Finch
- Tucuman Pygmy-owl
- Tufted Coquette
- Tufted duck
- Tufted Jay
- Tufted Puffin
- Tufted Titmouse
- Tuggerah Lake
- Tuggerah Lakes
- Tui (bird)
- Tui Parakeet
- Tullberg's Woodpecker
- Tully Gorge National Park
- Tumbes Hummingbird
- Tumbes Sparrow
- Tumbes Swallow
- Tumbes Tyrant
- Tupana Scythebill
- Tupinier Islands
- Turaco
- Turkey vulture
- Turnstone
- Turquoise-browed Motmot
- Turquoise-throated Puffleg
- Turquoise Dacnis
- Turquoise Parrot
- Turquoise Tanager
- Turtle-jawed Moa-nalo
- Turumtaykul
- Tuxtla Quail-Dove
- Twelve-wired Bird-of-paradise
- Twin Islands (Nunavut)
- Twite
- Two Peoples Bay and Mount Manypeaks Important Bird Area
- Two Peoples Bay Nature Reserve
- Tylas Vanga
- Tyrian Metaltail
- Tytler's Leaf Warbler
- Tyto pollens
- Tyto robusta
- Tyuleniy Archipelago (Kazakhstan)
- Ua Huka Rail
- Ubin–Khatib Important Bird Area
- Udayamarthandapuram Bird Sanctuary
- Udzungwa Forest Partridge
- Uganda Woodland Warbler
- Uhehe Fiscal
- ʻUla-ʻai-Hawane
- Ulladulla to Merimbula Important Bird Area
- Ultramarine Flycatcher
- Ultramarine Grosbeak
- Ultramarine Lorikeet
- Uluguru Bushshrike
- Umbrellabird
- Umdoni Bird Sanctuary
- Undulated Antshrike
- Unicolored Antwren
- Unicolored Jay
- Unicolored Tapaculo
- Unicoloured thrush
- Uniform Swiftlet
- Uniform Woodcreeper
- United States Fish and Wildlife Service list of endangered species of mammals and birds
- Unmu-do
- Unryul Kumsanpo
- Unspotted Saw-whet Owl
- Unstreaked Tit-Tyrant
- Upcher's Warbler
- Upland buzzard
- Upland Goose
- Upland Moa
- Upland Pipit
- Upland sandpiper
- Upper Magdalena Tapaculo
- Ural Owl
- Uria
- Urich's Tyrannulet
- Urkevitz
- Urosticte
- Urrao Antpitta
- Ursula's Sunbird
- Uruguay Island
- Usambara Akalat
- Usambara Eagle-Owl
- Usambara thrush
- Usambara Weaver
- Vaduvoor Bird Sanctuary
- Vágar
- Vallée de Mai
- Valley Wetlands
- Vampire Finch
- Van Dam's Vanga
- Van Hasselt's Sunbird
- Vanga
- Vanhankaupunginselkä
- Vanikoro Flycatcher
- Vanikoro Monarch
- Vanikoro white-eye
- Vansittart Island (Tasmania)
- Vanuatu Imperial Pigeon
- Vanuatu Kingfisher
- Vanuatu Petrel
- Vanuatu white-eye
- Vapour Col
- Varanus Island
- Variable Antshrike
- Variable Hawk
- Variable Oystercatcher
- Variable Seedeater
- Variable Sunbird
- Variable Wheatear
- Varied Bunting
- Varied Honeyeater
- Varied Lorikeet
- Varied Sittella
- Varied solitaire
- Varied thrush
- Varied Tit
- Varied Triller
- Variegated Antpitta
- Variegated fairywren
- Variegated Laughingthrush
- Varzea Mourner
- Varzea Piculet
- Varzea Schiffornis
- Várzea thrush
- Vasse-Wonnerup Estuary
- Vaurie's Nightjar
- Vaux's Swift
- Vedanthangal Bird Sanctuary
- Veery
- Vegaøyan
- Vegetarian Finch
- Vella Lavella White-eye
- Vellode Birds Sanctuary
- Velvet-browed Brilliant
- Velvet-fronted Euphonia
- Velvet-fronted Nuthatch
- Velvet-mantled drongo
- Velvet-purple Coronet
- Velvet Asity
- Velvet Flycatcher
- Velvet Scoter
- Velvety Black Tyrant
- Venezuelan Bristle Tyrant
- Venezuelan Flowerpiercer
- Venezuelan Sylph
- Venus Bay, South Australia
- Verdin
- Verditer Flycatcher
- Vermiculated Fishing Owl
- Vermilion Cardinal
- Vermilion Flycatcher
- Vernal Hanging Parrot
- Verreaux's coua
- Verreaux's Eagle
- Verreaux's Eagle-Owl
- Versicolored Monarch
- Versicoloured Barbet
- Versicoloured Emerald
- Vervain Hummingbird
- Vettangudi Bird Sanctuary
- Victoria's Riflebird
- Victoria Butterfly Gardens
- Victoria Crowned Pigeon
- Victorian Ornithological Research Group
- Victorian Wader Study Group
- Viðoy
- Vieillot's Barbet
- Vieillot's Black Weaver
- Vietnam Partridge
- Vietnamese Pheasant
- Vilcabamba Brush Finch
- Vilcabamba Tapaculo
- Vilcabamba Thistletail
- Village indigobird
- Village Weaver
- Vinaceous-breasted Amazon
- Vinaceous Dove
- Vinaceous Rosefinch
- Vincent Serventy
- Vinous-breasted Sparrowhawk
- Vinous-throated Parrotbill
- Violaceous coucal
- Violaceous Euphonia
- Violaceous Jay
- Violaceous Trogon
- Violet-backed Hyliota
- Violet-backed Starling
- Violet-bellied Hummingbird
- Violet-capped Woodnymph
- Violet-crowned Hummingbird
- Violet-crowned Woodnymph
- Violet-eared waxbill
- Violet-green Swallow
- Violet-headed Hummingbird
- Violet-necked Lory
- Violet-tailed Sunbird
- Violet-tailed Sylph
- Violet cuckoo
- Violet Macaw
- Violet Sabrewing
- Violet turaco
- Virginia's Warbler
- Virginia rail
- Visayan Blue Fantail
- Visayan Broadbill
- Visayan Bulbul
- Visayan Miniature Babbler
- Visayan pygmy babbler
- Vitelline Masked Weaver
- Vitelline Warbler
- Viti Levu Giant Pigeon
- Viti Levu Rail
- Viti Levu Scrubfowl
- Viti Levu Snipe
- Vivid Niltava
- Vogelkop Bowerbird
- Vogelkop Melidectes
- Vogelkop Scrubwren
- Vogelkop Whistler
- Volcano Hummingbird
- Volcano Junco
- Volunteer Point
- Von der Decken's Hornbill
- Von Schrenck's bittern
- Vulkathunha-Gammon Ranges National Park
- Vulturine Parrot
- W National Park
- W. Roy Wheeler Medallion
- Wades Green and Teren Hill Important Bird Area
- Wadi al-Qarn – Burqush Important Bird Area
- Wahi Grosbeak
- Wahlberg's Eagle
- Wahnes's Parotia
- Waigeo Brushturkey
- Waitaha penguin
- Wake Island Rail
- Wakolo Myzomela
- Walebing Important Bird Area
- Walker Island (Southern Tasmania)
- Wallabi Group
- Wallace's Fruit Dove
- Wallace's Hanging Parrot
- Wallace's scops owl
- Wallacean Cuckooshrike
- Wallacean drongo
- Wallacean Whistler
- Wallasea Wetlands
- Wallcreeper
- Waller's Starling
- Wallnau Waterbird Reserve
- Walmore Common
- Walter Charleton
- Walter Edmond Clyde Todd
- Walter Faxon
- Walter Freeman Webb
- Walter Goodfellow
- Walter Norman Koelz
- Walter Rothschild, 2nd Baron Rothschild
- Waltham Abbey SSSI
- Wandering albatross
- Wandown Important Bird Area
- Wangi Wangi white-eye
- Warbling Vireo
- Warby-Chiltern Box-Ironbark Region
- Warby Range State Park
- Ward's Flycatcher
- Ward's Trogon
- Warren Billingsley Hitchcock
- Warrumbungle National Park
- Wasgamuwa National Park
- Water Pipit
- Water rail
- Water Thick-knee
- Waterbird Society
- Watercock
- Waterloo State Recreation Area
- Watervalley Wetlands
- Watson Peninsula
- Wattlebird
- Wattled Broadbill
- Wattled crane
- Wattled Curassow
- Wattled Guan
- Wattled Honeyeater
- Wattled Ibis
- Wattled Jacana
- Wattled Ploughbill
- Wattled Smoky Honeyeater
- Wattled Starling
- Waved Albatross
- Waved Woodpecker
- Waychinicup National Park
- Weare, Somerset
- Weddin Mountains National Park
- Wedge-rumped storm petrel
- Wedge-tailed Eagle
- Wedge-tailed Grass Finch
- Wedge-tailed Green Pigeon
- Wedge-tailed Hillstar
- Wedge-tailed jery
- Wedge-tailed shearwater
- Wedge Island (South Australia)
- Weebill
- Weka
- Welcome Swallow
- Wellington Range
- Wells Cooke
- Welsh harlequin
- Welsh Ornithological Society
- Wembdon
- Wendar Island
- Werakata National Park
- Werribee and Avalon Important Bird Area
- Werrikimbe National Park
- West African Batis
- West African Wattle-eye
- West Coast National Park
- West End Pond
- West Himalayan Bush Warbler
- West Indian Woodpecker
- West Island (Lacepede Islands)
- West Mexican Chachalaca
- West Midland Bird Club
- West Moncoeur Island
- West Moor SSSI
- West of England Tumbler
- West of il-Hagra s-Sewda to ix-Xaqqa Cliffs Important Bird Area
- West of Wied ix-Xaqqa to Wied Maqbyl Cliffs Important Bird Area
- West Peruvian Dove
- West Point Island
- West Pyramid
- West Sedgemoor
- West Wallabi Island
- Western alpine mannikin
- Western Azores Goldcrest
- Western banded snake eagle
- Western Black-headed Batis
- Western Bluebill
- Western bluebird
- Western Bonelli's Warbler
- Western Bowerbird
- Western Bristlebird
- Western bronze-naped pigeon
- Western Canary Islands Chiffchaff
- Western Canary Islands Goldcrest
- Western Capercaillie
- Western Chat-Tanager
- Western Corella
- Western Crowned Pigeon
- Western Crowned Warbler
- Western District Lakes
- Western Fieldwren
- Western Gerygone
- Western Grasswren
- Western grebe
- Western Greenbul
- Western Ground Parrot
- Western Hemisphere Shorebird Reserve Network
- Western jackdaw
- Western Kingbird
- Western Lewin's Rail
- Western Marsh Harrier
- Western Meadowlark
- Western Nicator
- Western Olivaceous Warbler
- Western Oriole
- Western Orphean Warbler
- Western Parotia
- Western plantain-eater
- Western Port
- Western Quail-thrush
- Western Rock Nuthatch
- Western Rosella
- Western Rufous Bristlebird
- Western sandpiper
- Western screech owl
- Western Scrub Jay
- Western Silvereye
- Western Spinebill
- Western Tanager
- Western Thornbill
- Western Tragopan
- Western Treatment Plant
- Western Violet-backed Sunbird
- Western Wattlebird
- Western Whipbird
- Western Wood Pewee
- Western Yellow Robin
- Western Yellow Wagtail
- Westhay
- Westhay Heath
- Westhay Moor
- Westland Petrel
- Westmount Summit
- Westonzoyland
- Westonzoyland Pumping Station Museum
- Westwater Reservoir
- Wet Moor
- Wetar Figbird
- Wetar Ground Dove
- Whakaari / White Island
- Whimbrel
- Whinchat
- Whiskered Flowerpecker
- Whiskered Pitta
- Whiskered Screech Owl
- Whiskered tern
- Whiskered yuhina
- Whistler's Warbler
- Whistling Cisticola
- Whistling Fruit Dove
- Whistling Kite
- White-backed Black Tit
- White-backed Mousebird
- White-backed night heron
- White-backed Swallow
- White-backed Vulture
- White-backed Woodpecker
- White-backed Woodswallow
- White-banded Mockingbird
- White-barred Piculet
- White-bearded Greenbul
- White-bearded Manakin
- White-bellied Blue Flycatcher
- White-bellied Blue Robin
- White-bellied Bush Chat
- White-bellied Chachalaca
- White-bellied Cinclodes
- White-bellied Crested Flycatcher
- White-bellied Cuckooshrike
- White-bellied drongo
- White-bellied Emerald
- White-bellied erpornis
- White-bellied Fantail
- White-bellied go-away-bird
- White-bellied Goshawk
- White-bellied Green Pigeon
- White-bellied heron
- White-bellied Honeyeater
- White-bellied Hummingbird
- White-bellied Imperial Pigeon
- White-bellied Kingfisher
- White-bellied Minivet
- White-bellied munia
- White-bellied Parrot
- White-bellied Redstart
- White-bellied sea eagle
- White-bellied Seedsnipe
- White-bellied storm petrel
- White-bellied thrush
- White-bellied Tit
- White-bellied Treepie
- White-bellied Woodpecker
- White-bibbed Antbird
- White-bibbed babbler
- White-bibbed Swallow
- White-billed Buffalo Weaver
- White-breasted Antbird
- White-breasted babbler
- White-breasted Cormorant
- White-breasted Cuckooshrike
- White-breasted Guineafowl
- White-breasted Nigrita
- White-breasted nuthatch
- White-breasted Parrotbill
- White-breasted Robin
- White-breasted Tapaculo
- White-breasted Thrasher
- White-breasted Waterhen
- White-breasted Whistler
- White-breasted Wood Wren
- White-breasted Woodswallow
- White-bridled Finch
- White-browed Antpitta
- White-browed Babbler
- White-browed Blackbird
- White-browed Brush Finch
- White-browed Bulbul
- White-browed Bush Chat
- White-browed Bush Robin
- White-browed Chat-Tyrant
- White-browed Crombec
- White-browed Fantail
- White-browed Forest Flycatcher
- White-browed fulvetta
- White-browed Guan
- White-browed Hawk
- White-browed Hawk-Owl
- White-browed Jungle Flycatcher
- White-browed Laughingthrush
- White-browed Nuthatch
- White-browed Piculet
- White-browed Robin
- White-browed Robin-Chat
- White-browed Scimitar Babbler
- White-browed Scrubwren
- White-browed Shama
- White-browed Shortwing
- White-browed Sparrow-Weaver
- White-browed Tapaculo
- White-browed Tit
- White-browed Tit-Spinetail
- White-browed Tit-warbler
- White-browed Treecreeper
- White-browed Triller
- White-browed Wagtail
- White-browed Woodswallow
- White-capped Albatross
- White-capped Bunting
- White-capped Dipper
- White-capped Fruit Dove
- White-capped Monarch
- White-capped munia
- White-capped Redstart
- White-cheeked Barbet
- White-cheeked Bullfinch
- White-cheeked Bushtit
- White-cheeked Cotinga
- White-cheeked Honeyeater
- White-cheeked Nuthatch
- White-cheeked Partridge
- White-cheeked pintail
- White-cheeked Starling
- White-cheeked Tern
- White-cheeked Tody-Flycatcher
- White-cheeked turaco
- White-chested alethe
- White-chested Emerald
- White-chested Puffbird
- White-chested Tinkerbird
- White-chested white-eye
- White-chinned Myzomela
- White-chinned petrel
- White-chinned Prinia
- White-chinned thrush
- White-collared blackbird
- White-collared Foliage-gleaner
- White-collared Jay
- White-collared Monarch
- White-collared Oliveback
- White-collared Seedeater
- White-collared Starling
- White-collared yuhina
- White-crested Elaenia
- White-crested Guan
- White-crested Helmetshrike
- White-crested Hornbill
- White-crested laughingthrush
- White-crested tiger heron
- White-crested turaco
- White-crowned Forktail
- White-crowned Hornbill
- White-crowned Lapwing
- White-crowned Penduline Tit
- White-crowned Pigeon
- White-crowned Robin-Chat
- White-crowned Shama
- White-crowned Sparrow
- White-crowned wheatear
- White-eared Brown Dove
- White-eared Bulbul
- White-eared Ground Sparrow
- White-eared Honeyeater
- White-eared Hummingbird
- White-eared Monarch
- White-eared Myza
- White-eared Parakeet
- White-eared Puffbird
- White-eared solitaire
- White-eyed Buzzard
- White-eyed Foliage-gleaner
- White-eyed Gull
- White-eyed Parakeet
- White-eyed river martin
- White-eyed Slaty Flycatcher
- White-eyed thrush
- White-eyed Tody-Tyrant
- White-eyed Vireo
- White-faced Dove
- White-faced heron
- White-faced ibis
- White-faced Starling
- White-faced storm petrel
- White-faced Whitestart
- White-flanked Antwren
- White-flanked Sunbird
- White-flippered Penguin
- White-fronted Black Chat
- White-fronted Chat
- White-fronted Falconet
- White-fronted Honeyeater
- White-fronted Manakin
- White-fronted Nunbird
- White-fronted Plover
- White-fronted Quail-Dove
- White-fronted scops owl
- White-fronted Swift
- White-fronted Tern
- White-fronted Tit
- White-fronted Wattle-eye
- White-fronted Whitestart
- White-gaped Honeyeater
- White-gorgeted Flycatcher
- White-headed Barbet
- White-headed Buffalo Weaver
- White-headed Duck
- White-headed Fruit Dove
- White-headed Marsh Tyrant
- White-headed munia
- White-headed Petrel
- White-headed pigeon
- White-headed Starling
- White-headed Vanga
- White-headed Vulture
- White-headed Wood Hoopoe
- White-headed Woodpecker
- White-hooded Babbler
- White-lined Honeyeater
- White-lined Tanager
- White-lored Gnatcatcher
- White-lored Oriole
- White-lored Warbler
- White-mantled Barbet
- White-mantled Kingfisher
- White-masked Antbird
- White-naped brush finch
- White-naped crane
- White-naped Honeyeater
- White-naped Jay
- White-naped Lory
- White-naped Monarch
- White-naped pigeon
- White-naped Tit
- White-naped Woodpecker
- White-naped yuhina
- White-necked babbler
- White-necked coucal
- White-necked crow
- White-necked Hawk
- White-necked heron
- White-necked Jacobin
- White-necked Myna
- White-necked Puffbird
- White-necked raven
- White-necked Robin
- White-necked rockfowl
- White-necked thrush
- White-plumed Antbird
- White-plumed Honeyeater
- White-quilled Rock Pigeon
- White-rumped Cuckooshrike
- White-rumped munia
- White-rumped sandpiper
- White-rumped Seedeater
- White-rumped Shama
- White-rumped Snowfinch
- White-rumped Spinetail
- White-rumped Swift
- White-rumped Swiftlet
- White-rumped Triller
- White-rumped Vulture
- White-shouldered Black Tit
- White-shouldered Ibis
- White-shouldered Starling
- White-shouldered Tanager
- White-shouldered Triller
- White-sided Hillstar
- White-speckled Laughingthrush
- White-spectacled Bulbul
- White-spectacled Warbler
- White-spotted Fantail
- White-spotted Flufftail
- White-spotted Wattle-eye
- White-streaked Friarbird
- White-streaked Honeyeater
- White-striped Forest Rail
- White-striped Warbler
- White-striped Woodcreeper
- White-tailed alethe
- White-tailed ant thrush
- White-tailed Cotinga
- White-tailed eagle
- White-tailed Flycatcher
- White-tailed hawk
- White-tailed Hillstar
- White-tailed kite
- White-tailed lapwing
- White-tailed Monarch
- White-tailed Nuthatch
- White-tailed ptarmigan
- White-tailed Robin
- White-tailed Rubythroat
- White-tailed Sabrewing
- White-tailed Shrike
- White-tailed Starfrontlet
- White-tailed Stonechat
- White-tailed Swallow
- White-tailed Trogon
- White-tailed tropicbird
- White-tailed warbler
- White-thighed Hornbill
- White-throated Babbler
- White-throated Barbtail
- White-throated Bee-eater
- White-throated Bulbul
- White-throated Bush Chat
- White-throated Bushtit
- White-throated Cacholote
- White-throated Canary
- White-throated Caracara
- White-throated Dipper
- White-throated Fantail
- White-throated Francolin
- White-throated Gerygone
- White-throated Grasswren
- White-throated Greenbul
- White-throated Honeyeater
- White-throated Hummingbird
- White-throated Jay
- White-throated Jungle Flycatcher
- White-throated Kingbird
- White-throated Kingfisher
- White-throated Laughingthrush
- White-throated Magpie-Jay
- White-throated Mountain Babbler
- White-throated Mountaingem
- White-throated Needletail
- White-throated Redstart
- White-throated Robin
- White-throated Rock Thrush
- White-throated Seedeater
- White-throated Sparrow
- White-throated Swallow
- White-throated Swift
- White-throated Tapaculo
- White-throated thrush
- White-throated Toucan
- White-throated Towhee
- White-throated Treecreeper
- White-throated Treerunner
- White-throated Whistler
- White-throated Wren-Babbler
- White-tipped Dove
- White-tipped Monarch
- White-tipped Plantcutter
- White-tipped Quetzal
- White-tipped Sicklebill
- White-tufted Sunbeam
- White-vented Shama
- White-vented Violetear
- White-vented Whistler
- White-whiskered Hermit
- White-whiskered Laughingthrush
- White-whiskered Puffbird
- White-winged Becard
- White-winged Chough
- White-winged Cotinga
- White-winged Cuckooshrike
- White-winged Diuca Finch
- White-winged Dove
- White-winged Duck
- White-winged fairywren
- White-winged Grosbeak
- White-winged Guan
- White-winged Lark
- White-winged Magpie
- White-winged Parakeet
- White-winged Potoo
- White-winged Sandpiper
- White-winged scoter
- White-winged Snowfinch
- White-winged Swallow
- White-winged Swamp Warbler
- White-winged tern
- White-winged Triller
- White-winged Warbler
- White-winged Widowbird
- White-winged Woodpecker
- White Cockatoo
- White Eared Pheasant
- White Hawk
- White Monjita
- White stork
- White tern
- White Wagtail
- White Woodpecker
- Whitefish Bay
- Whitefish Point Bird Observatory
- Whitefish Point Light
- Whitehead's Broadbill
- Whitehead's Spiderhunter
- Whitehead's Swiftlet
- Whitehead's Trogon
- Whitehead (bird)
- Whitelake River
- Whitestone River
- Whooping crane
- Whooping Crane Summer Range
- Wicken Fen
- Wied's Tyrant-Manakin
- Wielangta forest
- Wilaru
- Wild Birds Protection Act 1902
- Wild turkey
- Wild Wind Islets
- Wilderness State Park
- Wildfowl & Wetlands Trust
- Wildlife of Phitsanulok Province
- Wilfred Backhouse Alexander
- Wilhelmina's Bird of Paradise
- Will Wagstaff
- Willard's Sooty Boubou
- Willcocks's Honeyguide
- Willet
- William Bartram
- William Beebe
- William Bert Emison
- William Brewster (ornithologist)
- William Dawson (ornithologist)
- William Eagle Clarke
- William Frederick Henry Rosenberg
- William G. Conway
- William Henry Hudson
- William Henry Phelps
- William Henry Sykes
- William John Swainson
- William Kitchen Parker
- William Leon Dawson
- William Lewin
- William Louis Abbott
- William Lutley Sclater
- William MacGillivray
- William Moreton Condry
- William Robert Ogilvie-Grant
- William Ruxton Davison
- William T. Cooper
- William Tinsley Keeton
- William Turner (naturalist)
- William Vincent Legge
- William Vogt
- William Warde Fowler
- William Willoughby Cole Verner
- William Yarrell
- Williams's Lark
- Williamson's Sapsucker
- Willie wagtail
- Willis's Antbird
- Willow Flycatcher
- Willow Man
- Willow ptarmigan
- Willow Tit
- Willow Warbler
- Willows and Wetlands Visitor Centre
- Wilson's Bird-of-paradise
- Wilson's Indigobird
- Wilson's phalarope
- Wilson's plover
- Wilson's storm petrel
- Wilson's Warbler
- Wilson Island (Queensland)
- Wilson Ornithological Society
- Wilson Reef
- Wilson Roy Wheeler
- Wilsons Promontory Islands Important Bird Area
- Wilsons Promontory Marine National Park
- Wilwell Farm Nature Reserve
- Winchell's Kingfisher
- Winding Cisticola
- Windmill Hill, Gibraltar
- Wine-throated Hummingbird
- Wing-barred Seedeater
- Wing-snapping Cisticola
- Wing Haven Gardens and Bird Sanctuary
- Winifred Cavendish-Bentinck, Duchess of Portland
- Winisk River Estuary
- Winter flooding of 2013–14 on the Somerset Levels
- Winter Wren
- Wire-crested Thorntail
- Wire-tailed Manakin
- Wire-tailed Swallow
- Witherby Memorial Lecture
- Witmer Stone
- Wolfe Island (Ontario)
- Wollogorang Important Bird Area
- Wollumbin National Park
- Wompoo Fruit Dove
- Wonderful Bird of Paradise
- Wonga Pigeon
- Wood duck
- Wood Harrier
- Wood hoopoe
- Wood Pipit
- Wood sandpiper
- Wood snipe
- Wood stork
- Wood thrush
- Wood Warbler
- Woodchat Shrike
- Woodcreeper
- Woodhouse's Antpecker
- Woodland Kingfisher
- Woodlark
- Woodpecker Finch
- Woodward's Batis
- Woodward's eagle
- Woodward brothers
- Wookey
- Woolavington
- Woolly-necked Stork
- Wooroonooran Important Bird Area
- Wooroonooran National Park
- Worcester's Buttonquail
- World Birding Center
- World Center for Birds of Prey
- World Migratory Bird Day
- Worthen's Sparrow
- Wreathed Hornbill
- Wreck Island
- Wrenthrush
- Wrentit
- Wrinkled Hornbill
- Writhed Hornbill
- Wrybill
- Wryneck
- Wührens
- WWT Arundel
- WWT Caerlaverock
- WWT Llanelli Wetlands Centre
- WWT London Wetland Centre
- WWT Martin Mere
- WWT Slimbridge
- WWT Washington
- WWT Welney
- Wye Marsh
- Wynaad Laughingthrush
- Wyndham Important Bird Area
- Wyperfeld National Park
- Wyperfeld, Big Desert and Ngarkat Important Bird Area
- Wyrrabalong National Park
- Xantus's Hummingbird
- Xavier's Greenbul
- Xenicus
- Xenopsitta
- Xestospiza
- Xestospiza conica
- Xestospiza fastigialis
- Xingu Antbird
- Xlendi Bay to Wardija Point Cliffs Important Bird Area
- Yala National Park
- Yalgorup Important Bird Area
- Yalgorup National Park
- Yambuk Important Bird Area
- Yanchep National Park
- Yanga National Park
- Yankee Harbour
- Yankee Springs Recreation Area
- Yap Cicadabird
- Yariguies Brush-finch
- Yashilkul
- Yelkouan Shearwater
- Yellow-backed Tanager
- Yellow-bearded Greenbul
- Yellow-bellied Bush Warbler
- Yellow-bellied Chat-Tyrant
- Yellow-bellied Dacnis
- Yellow-bellied Elaenia
- Yellow-bellied Eremomela
- Yellow-bellied Fantail
- Yellow-bellied Flowerpecker
- Yellow-bellied Flyrobin
- Yellow-bellied Hyliota
- Yellow-bellied Prinia
- Yellow-bellied Sapsucker
- Yellow-bellied Siskin
- Yellow-bellied Sunbird-Asity
- Yellow-bellied Tit
- Yellow-bellied Warbler
- Yellow-bellied Wattle-eye
- Yellow-bellied Whistler
- Yellow-bibbed Lory
- Yellow-billed Amazon
- Yellow-billed Babbler
- Yellow-billed Barbet
- Yellow-billed Blue Magpie
- Yellow-billed Cacique
- Yellow-billed cardinal
- Yellow-billed cuckoo
- Yellow-billed Duck
- Yellow-billed Jacamar
- Yellow-billed Kingfisher
- Yellow-billed Kite
- Yellow-billed loon
- Yellow-billed Lorikeet
- Yellow-billed Magpie
- Yellow-billed malkoha
- Yellow-billed Nuthatch
- Yellow-billed Oxpecker
- Yellow-billed Pintail
- Yellow-billed Shrike
- Yellow-billed Spoonbill
- Yellow-billed Stork
- Yellow-billed Teal
- Yellow-billed turaco
- Yellow-breasted Apalis
- Yellow-breasted Boubou
- Yellow-breasted Bowerbird
- Yellow-breasted Bunting
- Yellow-breasted Chat
- Yellow-breasted Fruit Dove
- Yellow-breasted Greenfinch
- Yellow-breasted Pipit
- Yellow-breasted Racket-tail
- Yellow-breasted Tit
- Yellow-breasted Warbling Antbird
- Yellow-browed Bulbul
- Yellow-browed Camaroptera
- Yellow-browed Melidectes
- Yellow-browed Tit
- Yellow-browed Tody-Flycatcher
- Yellow-browed Toucanet
- Yellow-browed Warbler
- Yellow-capped Pygmy Parrot
- Yellow-capped Weaver
- Yellow-casqued Hornbill
- Yellow-cheeked Becard
- Yellow-cheeked Tit
- Yellow-chevroned Parakeet
- Yellow-chinned Spinetail
- Yellow-collared Lovebird
- Yellow-collared Macaw
- Yellow-crested Cockatoo
- Yellow-crested Helmetshrike
- Yellow-crested Manakin
- Yellow-crested Woodpecker
- Yellow-crowned Amazon
- Yellow-crowned Bishop
- Yellow-crowned Elaenia
- Yellow-crowned Gonolek
- Yellow-crowned night heron
- Yellow-crowned parakeet
- Yellow-crowned Whitestart
- Yellow-crowned Woodpecker
- Yellow-eared Bulbul
- Yellow-eared Parrot
- Yellow-eared Toucanet
- Yellow-eared Woodpecker
- Yellow-eyed babbler
- Yellow-eyed Black Flycatcher
- Yellow-eyed Junco
- Yellow-eyed penguin
- Yellow-eyed pigeon
- Yellow-faced Grassquit
- Yellow-faced honeyeater
- Yellow-faced Myna
- Yellow-faced Parrot
- Yellow-faced Parrotlet
- Yellow-footed Flycatcher
- Yellow-footed Green Pigeon
- Yellow-footed gull
- Yellow-footed Honeyguide
- Yellow-fronted Barbet
- Yellow-fronted Canary
- Yellow-fronted Parrot
- Yellow-fronted Tinkerbird
- Yellow-green Bush Tanager
- Yellow-green Finch
- Yellow-green Vireo
- Yellow-headed Amazon
- Yellow-headed blackbird
- Yellow-headed Brush Finch
- Yellow-headed Caracara
- Yellow-headed Warbler
- Yellow-knobbed Curassow
- Yellow-legged Buttonquail
- Yellow-legged thrush
- Yellow-legged Weaver
- Yellow-lored Bristlebill
- Yellow-lored Tody-Flycatcher
- Yellow-mantled Weaver
- Yellow-mantled Widowbird
- Yellow-naped Amazon
- Yellow-olive Flatbill
- Yellow-plumed Honeyeater
- Yellow-ringed White-eye
- Yellow-rumped Cacique
- Yellow-rumped Flowerpecker
- Yellow-rumped Flycatcher
- Yellow-rumped Honeyguide
- Yellow-rumped mannikin
- Yellow-rumped Marshbird
- Yellow-rumped Thornbill
- Yellow-rumped Tinkerbird
- Yellow-rumped Warbler
- Yellow-scarfed Tanager
- Yellow-shouldered Amazon
- Yellow-shouldered Blackbird
- Yellow-shouldered Grassquit
- Yellow-sided Flowerpecker
- Yellow-spotted barbet
- Yellow-spotted Honeyeater
- Yellow-spotted Petronia
- Yellow-striped Brush Finch
- Yellow-tailed black cockatoo
- Yellow-tailed Oriole
- Yellow-thighed Finch
- Yellow-throated Apalis
- Yellow-throated Bulbul
- Yellow-throated Bunting
- Yellow-throated Bush Tanager
- Yellow-throated cuckoo
- Yellow-throated Euphonia
- Yellow-throated Greenbul
- Yellow-throated Hanging Parrot
- Yellow-throated Honeyeater
- Yellow-throated Laughingthrush
- Yellow-throated Leafbird
- Yellow-throated Leaflove
- Yellow-throated Longclaw
- Yellow-throated Miner
- Yellow-throated Nicator
- Yellow-throated Petronia
- Yellow-throated Scrubwren
- Yellow-throated Seedeater
- Yellow-throated Sparrow
- Yellow-throated Tinkerbird
- Yellow-throated Warbler
- Yellow-throated Whistler
- Yellow-throated Woodpecker
- Yellow-tufted Honeyeater
- Yellow-tufted Woodpecker
- Yellow-vented Bulbul
- Yellow-vented Eremomela
- Yellow-vented Flowerpecker
- Yellow-vented Green Pigeon
- Yellow-vented Warbler
- Yellow-wattled Bulbul
- Yellow-wattled Lapwing
- Yellow-whiskered Bush Tanager
- Yellow-winged Pytilia
- Yellow-winged Tanager
- Yellow Bishop
- Yellow bittern
- Yellow Bunting
- Yellow Canary
- Yellow Chat
- Yellow Honeyeater
- Yellow Longbill
- Yellow oriole
- Yellow Penduline Tit
- Yellow rail
- Yellow Thornbill
- Yellow Tit
- Yellow Wattlebird
- Yellowbill
- Yellowhammer
- Yellowhead (bird)
- Yellowish Bulbul
- Yellowish Flycatcher
- Yellowish Imperial Pigeon
- Yellowish Pipit
- Yellowish White-eye
- Yemen thrush
- Yinberrie Hills Important Bird Area
- Ynys-hir RSPB reserve
- Ynys Feurig
- Ynys Feurig, Cemlyn Bay and The Skerries Special Protection Area
- Ythan Estuary
- Yucatan Amazon
- Yucatan Bobwhite
- Yucatan Flycatcher
- Yucatan Jay
- Yucatan Poorwill
- Yucatan Vireo
- Yucatan Woodpecker
- Yucatan Wren
- Yungas Antwren
- Yungas Tody-Tyrant
- Yungas Tyrannulet
- Yunnan Fulvetta
- Yunnan Nuthatch
- Yunnan Parrotbill
- Yves Aubry
- Zambezi Indigobird
- Zamboanga Bulbul
- Zapata rail
- Zapata Sparrow
- Zapata Wren
- Zebra Dove
- Zebra Finch
- Zeltornis
- Zenaida Dove
- Zenker's Honeyguide
- Zigzag heron
- Zimmer's Tapaculo
- Zimmer's Woodcreeper
- Zino's petrel
- Zitting Cisticola
- Zone-tailed hawk
- Zoo Miami
- Zorkul Nature Reserve