Outline of birds
The following outline is provided as an overview of and topical guide to birds:
Extant birds range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich.
What type of thing is a bird?
A bird can be described as all of the following:
- Life form– entity or being that is living or alive.
- Animal – multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their lives. Most animals are motile, meaning they can move spontaneously and independently.
Biological classification
- Kingdom: Animalia
- Phylum: Chordata
- Class: Aves
Nature of birds
Bird anatomy
- List of terms used in bird topography
- Beak
- Caruncle
- Comb
- Feathers
- Alula
- Barb (feather)
- Barbule
- Covert (feather)
- Crest (feathers)
- Down feather
- Ear tuft
- Feather holes
- Feather-plucking
- Flight feather
- Pennaceous feather
- Pin feather
- Plumage
- Quill
- Speculum feather
- Gape
- Gizzard
- Preen gland
- Syrinx
- Vision
- Uropygial gland
- Wattle
Bird behavior
Bird behavior
- Bird colony
- Feeding
- Flight
- Flightless birds
- Flocking
- Migration
- Flyway
- Atlantic Flyway
- Central Flyway
- Central Asian Flyway
- East Asian - Australasian Flyway
- East Atlantic Flyway
- Mississippi Flyway
- Pacific Flyway
- West Pacific Flyway
- Pigeon intelligence
- Flyway
- Abnormal behaviour of birds in captivity
- Aggression
- Anting (bird activity)
- Begging behavior in birds
- Distraction display
- Dust bathing
- Feather-plucking
- Fecal sac
- Intelligence
- Mobbing
- Moult
- Preening
- Reproduction
- Avian incubation
- Bird-nesting
- Brood parasite
- Clutch (eggs)
- Egg
- Egg tossing
- Fledgling
- Homosexual behavior in birds
- List of birds displaying homosexual behavior
- Sexual behaviour
- Nest
- Altricial
- Nest box
- Precocial
- Siblicide
- Roosting
- Tracks
- Vocalization