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The diving ducks, commonly called pochards or scaups, are a category of duck which feed by diving beneath the surface of the water. They are part of Anatidae, the diverse and very large family that includes ducks, geese, and swans. The diving ducks are placed in a distinct tribe in the subfamily Anatinae, the Aythyini.
The greater scaup (Aythya marila), just scaup in Europe or, colloquially, "bluebill" in North America, [3] is a mid-sized diving duck, larger than the closely related lesser scaup and tufted duck. It spends the summer months breeding in Iceland, east across Scandinavia, northern Russia and Siberia, Alaska, and northern Canada.
Hybrids between lesser scaup and ring-necked ducks are recognizable by very dark wings contrasting with a light grey underside more than in the lesser scaup but less than in the ring-necked duck. Hybrids between the lesser scaup and the redhead (A. americana) are recognizable by the lack of contrast between wings and belly and the dull brownish ...
The ring-necked duck (Aythya collaris) is a diving duck from North America commonly found in freshwater ponds and lakes. [3] The scientific name is derived from Greek aithuia , an unidentified seabird mentioned by authors including Hesychius and Aristotle , and Latin collaris , "of the neck" from collum , "neck".
The redhead is a pochard, a diving duck specially adapted to foraging underwater. Their legs are placed further back on the body, which makes walking on land difficult. The webbing on their feet is larger than dabbling ducks and their bills are broader to facilitate underwater foraging.
Pochard is a common name used for several species of diving ducks: Four species in the genus Aythya: Common pochard, Aythya ferina; Baer's pochard, Aythya baeri; Ferruginous pochard, Aythya nyroca; Madagascar pochard, Aythya innotata; Three species in the genus Netta: Red-crested pochard, Netta rufina; Rosy-billed pochard or Rosybill, Netta ...
The Brazilian merganser (Mergus octosetaceus) is a South American diving duck in the Mergus genus. It is one of the most threatened waterfowl species in the world, with possibly fewer than 250 birds in the wild and a small number kept in captivity in Brazil. [1] It has a long, sharp-edged beak with a great number of tooth-like edges.
The surf scoter (Melanitta perspicillata) is a large sea duck native to North America.Adult males are almost entirely black with characteristic white patches on the forehead and the nape and adult females are slightly smaller and browner.