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wigeon
The wigeons or widgeons are dabbling ducks in the genus ''Anas''.
==Biology==
There are three extant species: the Eurasian wigeon (''Anas penelope''), the American wigeon (''A. americana'') and the Chiloé wigeon (''A. sibilatrix''). A fourth species, the Amsterdam wigeon (''Anas marecula''), became extinct in the 19th century.
All three are similarly shaped, with a steep forehead and bulbous rear to the head. Males have a distinctive breeding plumage, in their eclipse plumage they resemble females, which are similar in appearance year-round. The three species' closest relatives within the genus ''Anas'' are the gadwall and the falcated duck. All three wigeon species hybridise in captivity while American and Eurasian wigeons hybridise in the wild.〔Carey, Geoff J. (1993). Hybrid male wigeon in East Asia ''Hong Kong Bird Report 1992'' 160-6〕 An American wigeon × mallard hybrid has also been recorded.
The American wigeon was formerly called the ''baldpate'' by ornithologists, and some people still use that name, especially hunters.
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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