Saunders's gull

Source: Wikipedia, the free encyclopedia.

Saunders's gull
Summer plumage
Winter plumage
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Laridae
Genus: Saundersilarus
Dwight, 1926
Species:
S. saundersi
Binomial name
Saundersilarus saundersi
(Swinhoe, 1871)
Synonyms
  • Larus saundersi
  • Chroicocephalus saundersi

Saunders's gull (Saundersilarus saundersi) or the Chinese black-headed gull,

estuarine waters and intertidal marshes
. As with many other gulls, it has traditionally been placed in the
monotypic Saundersilarus.[2] In 2023, this transfer was recognized by the International Ornithologists' Union.[3]

It is threatened by

habitat loss. One of its few remaining strongholds are the Yancheng Coastal Wetlands
, which hosts about 20% of the world's population.

The Saunders's gull is named after the British ornithologist Howard Saunders.[4]

Description

This is a very small species of gull with a length of just 33 cm (13 in) and, among gulls, only the little gull is smaller. Adults have a black hood and nape during the breeding season.[5] It is very pale with a white body, pale grey wings and a narrow black tail band. The legs and short bill are black and the body is squat. Non-breeding birds have a mottled grey hood and nape, and white-tipped wings with black markings on the primaries.[6]

Distribution and habitat

Saunders's gull breeds in eastern China and the west coast of Korea. It breeds in saltmarshes dominated by the

seepweed (Suaeda glauca). It overwinters in southern China, Hong Kong, Macau, Taiwan, South Korea, southwestern Japan and Vietnam. Its winter habitats are estuaries and aquaculture ponds and some populations move inland to lakes and marshes.[6]

Biology

Saunders's gull catches its prey by flying above the ground at about ten metres (yards) and dropping swiftly on any suitable prey it finds. In this way it catches mudskippers, crabs, fish and worms. It is also a kleptoparasite, stealing food items from other species of birds. It is a poor swimmer, having only partially webbed feet, and usually stays on land, moving up the beach in front of the rising tide.[6]

It breeds in saltmarshes, its nest being a simple scrape in the ground. The birds are

incubation takes about 22 days. Adults and young birds leave for their winter quarters in October.[6]

Status

The total population of this gull is estimated as being 21,000 to 22,000 individuals and seems to be in decline. The

smooth cordgrass (Spartina alterniflora) has also had deleterious effects. The disturbance of adults also results in greater predation on the eggs and chicks.[1]

References

  1. ^ a b c d BirdLife International (2012). "Saundersilarus saundersi". IUCN Red List of Threatened Species. 2012. Retrieved 2013-12-11.
  2. PMID 16054399
    .
  3. Rasmussen, Pamela (eds.). "IOC World Bird List 14.1"
    (xlsx). Retrieved 2023-12-20.
  4. ISBN 978-1-4081-2501-4
    .
  5. ^ BirdLife International
  6. ^ a b c d "Saunder's gull (Larus saundersi)". ARKive. Archived from the original on 2013-12-16. Retrieved 2013-12-12.

External links

Wikispecies has information related to Chroicocephalus saundersi.
Wikimedia Commons has media related to Chroicocephalus saundersi.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Saunders%27s_gull&oldid=1220796278"