Английская Википедия:Crowned cormorant
Шаблон:Short description Шаблон:Use South African English Шаблон:Speciesbox
The crowned cormorant (Microcarbo coronatus) or Шаблон:Lang-af, is a small cormorant that is endemic to the waters of the cold Benguela Current of southern Africa. It is an exclusively coastal species and is not found more than 10 km (6 mi) away from land. This species is related to the reed cormorant, and was formerly considered to the same species.
Distribution
It is found from Cape Agulhas north to Swakopmund along the coast of southern Africa.
The population appears to be between 2500 and 2900 breeding pairs. It breeds in small groups, with fewer than 150 individuals per colony being typical. Ringing recoveries show that juveniles may disperse up to 277 km from their nests, and adults move between breeding sites over 500 km apart.
Description
The crowned cormorant is 50–55 cm in length. Adults are black with a small crest on the head and a red face patch. Young birds are dark brown above, paler brown below, and lack the crest. They can be distinguished from immature reed cormorants by their darker underparts and shorter tail.
Behaviour
Crowned cormorants feed on slow-moving fish and invertebrates, which they forage for in shallow coastal waters and among kelp beds.
It builds a nest from kelp, sticks, bones and lines it with kelp or feathers. The nest is usually in an elevated position such as a rocks, trees or man-made structures, but may be built on the ground.
Conservation
Threats to the species include predation of eggs and chicks by kelp gulls and great white pelicans, human disturbance, oiling, and commercial fishing activities, including entanglement in marine debris and plastic fishing gear.
According to the Sasol Birds of Southern Africa and The Eskom Red Data Book of Birds of South Africa, Lesotho and Swaziland, its status is Near Threatened due to its small distribution area.[1]
Gallery
References
- Ian Sinclair, Phil Hockey and Warwick Tarboton, SASOL Birds of Southern Africa (Struik 2002) Шаблон:ISBN
- Шаблон:Cite iucn
- Шаблон:Cite book
External links
- Species report Animal Demography Unit of the University of Cape Town
- Crowned Cormorant - The Atlas of Southern African Birds
- Страницы с неработающими файловыми ссылками
- Английская Википедия
- Microcarbo
- Birds of Southern Africa
- Birds described in 1855
- Taxa named by Johan August Wahlberg
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
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