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''Falcipennis'' is a genus of birds in the grouse family that comprises three very similar species: * Siberian grouse, ''Falcipennis falcipennis'' * Spruce grouse, ''Falcipennis canadensis'' * Franklin's grouse, ''Falcipennis franklinii'' Both inhabit northern coniferous forests and live on conifer needles during the winter. Both have breeding systems with dispersed male territories, intermediate between the leks of some grouse and the monogamy of others. ==Etymology== ''Falcipennis'' means "sickle-winged" in New Latin; the wings are swept back in flight. 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「Falcipennis」の詳細全文を読む スポンサード リンク
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