The long-tailed duck (Clangula hyemalis), formerly known as oldsquaw, is a medium-sized sea duck that breeds in the tundra and taiga regions of the arctic and winters along the northern coastlines of the Atlantic and Pacific Oceans. It is the only member of the genus Clangula. Taxonomy The long-tailed duck was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae. He placed it with all the other ducks in the genus Anas and coined the binomial name Anas hyemalis. Linnaeus cited the English naturalist George Edwards's description and illustration of the "Long-tailed duck from Hudson's-Bay" that had been published in 1750 in the third volume of his A Natural History of Uncommon Birds. This duck is now the only species placed in the genus Clangula that was introduced in 1819 to accommodate the long-tailed duck by the English zoologist William Leach in an appendix to John Ross's account of his voyage to look for the Northwest Passage. The genus name Clangula is a diminutive of the Latin clangere meaning "to resound". The specific epithet hyemalis is Latin meaning "of winter". The species is considered to be monotypic: no subspecies are recognised. In North American English it is sometimes called oldsquaw, though this name has fallen out of favour. Some biologists have also feared that this name would be offensive to some Native American tribes involved in the conservation effort. The American Ornithologists' Union stated that "political correctness" was not sufficient to change the name, but "to conform with English usage in other parts of the world", it officially adopted the name "Long-tailed Duck". An undescribed congener is known from the Middle Miocene Sajóvölgyi Formation (Late Badenian, 13–12 Mya) of Mátraszőlős, Hungary. Description Adults have white underparts, though the rest of the plumage goes through a complex moulting process. The male has a long pointed tail ( long) and a dark grey bill crossed by a pink band. In winter, the male has a dark cheek patch on a mainly white head and neck, a dark breast and mostly white body. In summer, the male is dark on the head, neck and back with a white cheek patch. The female has a brown back and a relatively short pointed tail. In winter, the female's head and neck are white with a dark crown. In summer, the head is dark. Juveniles resemble adult