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2. African black duck - Wikipedia

   en.wikipedia.org/wiki/African_Black_Duck

   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 ...

3. Category:Anas - Wikipedia

   en.wikipedia.org/wiki/Category:Anas

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

4. Black Duck - Wikipedia

   en.wikipedia.org/wiki/Black_Duck

   Black duck may refer to three dabbling ducks: African black duck, Anas sparsa; American black duck, Anas rubripes; Pacific black duck, Anas superciliosa;

5. Category:Birds of Africa - Wikipedia

   en.wikipedia.org/wiki/Category:Birds_of_Africa

   A. African barred owlet; African black duck; African black swift; African blue tit; African broadbill; African chaffinch; African citril; African collared dove

6. List of birds of Africa - Wikipedia

   en.wikipedia.org/wiki/List_of_birds_of_Africa

   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.

7. List of birds of Cameroon - Wikipedia

   en.wikipedia.org/wiki/List_of_birds_of_Cameroon

   This is a list of the bird species recorded in Cameroon.The avifauna of Cameroon include a total of 970 species, of which 10 are endemic.. This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of The Clements Checklist of Birds of the World, 2022 edition.

8. Mallard complex - Wikipedia

   en.wikipedia.org/wiki/Mallard_complex

   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.

9. List of birds of the Democratic Republic of the Congo

   en.wikipedia.org/wiki/List_of_birds_of_the...

   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.