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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 Northwestern crow ： ウィキペディア英語版 Northwestern crow The northwestern crow (''Corvus caurinus'') is an all-black passerine bird of the crow genus native to the northwest of North America. It is very similar to the more western forms of the widespread American crow (''Corvus brachyrhynchos''), but it averages slightly smaller (33–41 cm in length) with proportionately smaller feet and a slightly more slender bill. This taxon is reliably identified by range only. ==Taxonomy== This species was described by Spencer Fullerton Baird in 1858.〔American Ornithologists' Union. (1983) Check-list of North American Birds. 7th Edition.〕 The American Ornithologists' Union considers it closely related to the American crow, and it may be conspecific.〔 Hybrids with American crow have been reported but not confirmed.〔Pyle, Peter. (1997). Identification Guide to North American Birds〕 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「Northwestern crow」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.