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The bean goose is a goose that breeds in northern Europe and Asia. It has two distinct varieties, one inhabiting taiga habitats and one inhabiting tundra. These are recognised as separate species by the American Ornithologists' Union, but are considered a single species by other authorities, such as the British Ornithologists' Union. It is migratory and winters further south in Europe and Asia. == Description == The length ranges from , wingspan from and weight from .〔 In the nominate subspecies, males average and females average .〔 The bill is black at the base and tip, with an orange band across the middle; the legs and feet are also bright orange. The upper wing-coverts are dark brown, as in the white-fronted goose (''Anser albifrons'') and the lesser white-fronted goose (''A. erythropus''), but differing from these in having narrow white fringes to the feathers. The voice is a loud honking, higher pitched in the smaller subspecies. The closely related pink-footed goose (''A. brachyrhynchus'') has the bill short, bright pink in the middle, and the feet also pink, the upper wing-coverts being nearly of the same bluish-grey as in the greylag goose. In size and bill structure, it is very similar to ''Anser fabalis rossicus'', and in the past was often treated as a sixth subspecies of bean goose. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bean goose」の詳細全文を読む スポンサード リンク
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