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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Broad-winged hawk ： ウィキペディア英語版 Broad-winged hawk The broad-winged hawk (''Buteo platypterus'') is a small hawk of the genus ''Buteo''. During the summer, some subspecies are distributed over eastern North America, as far west as British Columbia and Texas; they then migrate south to winter in the neotropics from Mexico down to southern Brazil.〔 Other subspecies are all-year residents on Caribbean islands. As in most raptors, females are slightly larger than males. Broad-winged hawks' wings are relatively short and broad with a tapered, somewhat pointed appearance. There are two types of colouration: a dark morph with fewer white areas and a light morph that is more pale overall. Although the broad-winged hawk's numbers are relatively stable, populations are declining in some parts of its breeding range because of forest fragmentation. ==Description== The broad-winged hawk is a relatively small ''Buteo'', with a body size from in length and weighing anywhere from . The tail is relatively short, measuring in length. The tarsus measures from .〔〔 As in most raptors, females are slightly larger than males.〔 Broad-winged hawks have relatively short and broad wings, pointed at the end, which have a tapered appearance unique to the species. The wingspan can range from , with the extended wing bone (standard measurement) measuring .〔 Adults' bodies are a dark brown with a white belly and chest containing horizontal barring. Their tail can be a dark grey-black with white lines along the middle, base and tip.〔 The young hawks have a slightly different colouring with more white and longitudinal barring instead of horizontal barring. There are two types of colouration: a dark morph with fewer white areas and a light morph that is more pale overall.〔 The light morph of this bird is most likely to be confused with the red-shouldered hawk, but they have a longer, more heavily barred tail and wings with a solid rufous colour in the adult which are usually distinctive.〔 Rare dark morphs are a darker brown on both upperparts and underparts. Dark-morph short-tailed hawks are similar but are whitish under the tail with a single subterminal band.〔 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「Broad-winged hawk」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.