Cormorano coronato

Identificazione

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.

Tassonomia

Nome scientifico

Microcarbo coronatus

Autorità

(Wahlberg, 1855)

Ordine

Suliformi

Famiglia

Phalacrocoracidae

Genere

Microcarbo

Areale e habitat

It is found from Cape Agulhas north to Swakopmund along the coast of southern Africa.<p>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.

Migrazione

Resident species

Comportamento

Crowned cormorants feed on slow-moving fish and invertebrates, which they forage for in shallow coastal waters and among kelp beds.<p>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.

Conservazione

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.<p>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, though the IUCN lists it as Least Concern.

Tendenza della popolazione

stable