The canvasback (Aythya valisineria) is a species of diving duck, the largest found in North America. It is also one of the most powerful fliers. The part of its scientific name valisineria comes from the wild celery, whose winter buds and rhizomes...
The Tufted duck (Aythya fuligula) is a small diving duck found in northern Eurasia. Its scientific name comes from Ancient Greek word aithuia, an unidentified seabird mentioned by authors including Hesychius and Aristotle, and Latin words fuligo...
The Greater scaup (Aythya marila) is a diving duck also known as scaup in Europe or, colloquially, "bluebill" in North America. The name of this bird may come from "scalp", a Scottish and Northern English word for a shellfish bed, or from the duck's...
The redhead (Aythya americana) is a diving duck found in the Americas. It is closely related to the canvasback and belongs to the family which also includes ducks, swans, and geese. The scientific name of the redhead can be translated as "American...
The lesser scaup (Aythya affinis ) is a small North American diving duck that migrates south as far as Central America in winter. It is colloquially known as the little bluebill or broadbill because of its distinctive blue bill. The origin of the...
The common pochard (; Aythya ferina ) is a medium-sized diving duck. The scientific name is derived from Greek aithuia an unidentified seabird mentioned by authors including Hesychius and Aristotle, and Latin ferina, "wild game", from ferus, "wild".
The ring-necked duck (Aythya collaris ) is a diving duck from North America commonly found in freshwater ponds and lakes. The scientific name is derived from Greek aithuia, an unidentified seabird mentioned by authors including Hesychius and...
The ferruginous duck, also ferruginous pochard, common white-eye or white-eyed pochard (Aythya nyroca ) is a medium-sized diving duck from Eurosiberia. The scientific name is derived from Greek aithuia an unidentified seabird mentioned by authors...
Baer's pochard (Aythya baeri ) is a diving duck found in eastern Asia. It breeds in southeast Russia and northeast China, migrating in winter to southern China, Vietnam, Japan, and India. The name commemorates the Estonian naturalist Karl Ernst von...
The Madagascar pochard or Madagascan pochard (Aythya innotata ; Malagasy: Fotsy maso, Onjo) is an extremely rare diving duck of the genus Aythya. Thought to be extinct in the late 1990s, specimens of the species were rediscovered at Lake...
The New Zealand scaup (Aythya novaeseelandiae ) commonly known as a black teal, is a diving duck species of the genus Aythya. It is endemic to New Zealand. In Māori it is commonly known as papango, also matapouri, titiporangi, raipo.
The hardhead (Aythya australis ), also known as the white-eyed duck, is the only true diving duck found in Australia. The common name "hardhead" has nothing to do with the density of the bird's skull, instead referring to the difficulty encountered...
