Crowned Cormorant
Encyclopedia
The Crowned Cormorant, Microcarbo coronatus, 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 always found at least 10 km (6 mi) away from land. This species is related to the Reed Cormorant, and was formerly considered to the same species.
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.
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.
s, 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.
s and Great White Pelicans, human disturbance, oiling, and commercial fishing activities, including entanglement in marine debris and fishing gear.
Cormorant
The bird family Phalacrocoracidae is represented by some 40 species of cormorants and shags. Several different classifications of the family have been proposed recently, and the number of genera is disputed.- Names :...
that is endemic
Endemic (ecology)
Endemism is the ecological state of being unique to a defined geographic location, such as an island, nation or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, all species of lemur are endemic to the...
to the waters of the cold Benguela Current
Benguela Current
The Benguela Current is the broad, northward flowing ocean current that forms the eastern portion of the South Atlantic Ocean gyre. The current extends from roughly Cape Point in the south, to the position of the Angola-Benguela Front in the north, at around 16°S. The current is driven by the...
of southern Africa
Southern Africa
Southern Africa is the southernmost region of the African continent, variably defined by geography or geopolitics. Within the region are numerous territories, including the Republic of South Africa ; nowadays, the simpler term South Africa is generally reserved for the country in English.-UN...
. It is an exclusively coastal species and is always found at least 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 AgulhasCape Agulhas
Cape Agulhas is a rocky headland in the Western Cape, South Africa. It is the geographic southern tip of Africa and the official dividing point between the Atlantic and Indian oceans...
north to Swakopmund
Swakopmund
Swakopmund is a city on the coast of northwestern Namibia, west of Windhoek, Namibia's capital. It is the capital of the Erongo administrative district. As a seaside resort, the weather is cooler here in December to January so the territorial administration moves to Swakopmund for these months...
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.
Behavior
Crowned Cormorants feed on slow-moving fish and invertebrateInvertebrate
An invertebrate is an animal without a backbone. The group includes 97% of all animal species – all animals except those in the chordate subphylum Vertebrata .Invertebrates form a paraphyletic group...
s, which they forage for in shallow coastal waters and among kelp beds.
It builds a nest from kelp
Kelp
Kelps are large seaweeds belonging to the brown algae in the order Laminariales. There are about 30 different genera....
, 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 GullKelp Gull
The Kelp Gull , also known as the Dominican Gull, breeds on coasts and islands through much of the southern hemisphere. The race L. d. vetula occurs around southern Africa, and nominate L. d...
s and Great White Pelicans, human disturbance, oiling, and commercial fishing activities, including entanglement in marine debris and fishing gear.
External links
- Species report Avian Demography Unit of the University of Cape TownUniversity of Cape TownThe University of Cape Town is a public research university located in Cape Town in the Western Cape province of South Africa. UCT was founded in 1829 as the South African College, and is the oldest university in South Africa and the second oldest extant university in Africa.-History:The roots of...