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The species is monotypic: no subspecies are recognised. [5] The genus name is derived from Ancient Greek βουκέφαλος bouképhalos, ' bullheaded ', from boûs ' bull ', and kephalḗ, ' head ', a reference to the oddly bulbous head shape of the species. The species name albeola is a diminutive of Latin albus meaning ' white '. [6]
The black and the white-winged scoters are physically very similar to the surf scoter but in flight, the surf scoter is the only one with completely dark wings. [13] Like all sea ducks, the surf scoter becomes flightless during the simultaneous molt of its flight feathers. This vulnerable period happens usually in late July through early August ...
Gulls are typically gray or white, often with black markings on the head or wings. They have longish bills and webbed feet. Terns are a group of generally medium to large seabirds typically with gray 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.
The genus Bucephala was introduced in 1858 by American naturalist Spencer Baird with the bufflehead as the type species. [1] [2] The genus name is derived from Ancient Greek βουκέφαλος bouképhalos, meaning ' bullheaded ', from boûs ' bull ', and kephalḗ, ' head ', a reference to the crest of the bufflehead making its head look ...
The ferruginous duck (Aythya nyroca), also known as ferruginous pochard, common white-eye or white-eyed pochard, is a medium-sized diving duck from Eurosiberia.The scientific name is derived from the Ancient Greek word, αἴθυιᾰ (aithuia), an unknown seabird mentioned by authors including Hesychius and Aristotle, and the Russian word, нырок (nyrok), [2] the Russian word for pochard ...
A black crown stripe runs over the top of the head, with chestnut patches on either side. A black-bordered white collar separates the head from the breast. The body is largely a lighter slate blue with chestnut sides. A black-bordered white bar divides the breast vertically from the sides. The tail is black, long and pointed.
The common name white-headed duck, like the specific name, refers to its white head. [4] It interbreeds with other species in its genus, such as the ruddy duck. The hybrids are fully fertile and capable of having viable offspring with both parent species. [4] The species is monotypic. Different populations of the white-headed duck do not ...
A tufted duck in flight showing the white wingbar. The species are plump, compact, medium-sized ducks ranging from 37–61 cm long, 60–84 cm wingspan, and weighing 410–1600 g, with canvasback the largest, and ring-necked duck and ferruginous duck marginally the smallest.