Search results
Results from the WOW.Com Content Network
African black duck. The African black duck is a black duck with pronounced white marks on its back, a dark bill, and orange legs and feet. A purpish-blue speculum is often visible, especially in flight. It lives in central and southern Africa. It is also known as the black river duck, or (A. s. leucostigma) West African black duck or Ethiopian ...
A. s. leucostigma Rüppell 1845 (pink-billed black duck) A. s. sparsa Eyton 1838 (South African black duck) Anas melleri Sclater 1865 (Meller's duck) EN C2a(ii) Anas undulata Dubois 1839 (yellow-billed duck) LC. A. u. ruppelli Blyth 1855 (northern yellow-billed duck) A. u. undulata Dubois 1839 (southern yellow-billed duck) Anas laysanensis ...
Black duck may refer to three dabbling ducks: African black duck, Anas sparsa; American black duck, Anas rubripes; Pacific black duck, Anas superciliosa;
African black duck; American black duck; Anas (Mareca) Andean teal; Auckland teal; B. Bermuda flightless duck; Bernier's teal; Brown teal; C.
The retention of ancestral genetic variation can be caused by incomplete lineage sorting (ILS) and introgression after secondary contact. These two factors can cause genetic variation to be shared between closely related species which is possibly why an American black duck or a Mottled duck (Anas fulvigula) may have notable white on its speculum or a Mexican duck may have flecks of green.
This is a list of the bird species recorded in Africa.The area covered by this list is the Africa region defined by the American Birding Association's listing rules. [1] In addition to the continent itself, the area includes Madagascar, Mauritius, Rodrigues, Seychelles, Cape Verde, the Comoro Islands, Zanzibar and the Canary Islands, São Tomé and Príncipe and Annobón in the Gulf of Guinea.
Roblox occasionally hosts real-life and virtual events. They have in the past hosted events such as BloxCon, which was a convention for ordinary players on the platform. [45] Roblox operates annual Easter egg hunts [51] and also hosts an annual event called the "Bloxy Awards", an awards ceremony that also functions as a fundraiser. The 2020 ...
Gulls are typically grey or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet. Terns are a group of generally medium to large seabirds typically with grey or white plumage, often with black markings on the head. Most terns hunt fish by diving but some pick insects off the surface of fresh water.