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Long-tailed duck
The long-tailed duck (''Clangula hyemalis''), once known as oldsquaw, is a medium-sized sea duck. It is the only living member of its genus, ''Clangula''; this was formerly used for the goldeneyes, with the long-tailed duck being placed in ''Harelda''. 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 females in autumn plumage, though with a lighter, less distinct cheek patch.
The males are vocal and have a musical yodelling call ''ow, ow, owal-ow''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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