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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 Bicknell's thrush ： ウィキペディア英語版 Bicknell's thrush The Bicknell's thrush (''Catharus bicknelli'') is a medium-sized thrush, at and . It was named after Eugene Bicknell, an American amateur ornithologist, who discovered the species on Slide Mountain in the Catskills in the late 19th century. ==Description== Bicknell's thrush is just slightly smaller than the other northern migratory ''Catharus'' thrushes, with an average length of approximately and a mean weight of , with a range from . The sexes are roughly the same size, although males average slightly larger in wing length.〔Rimmer, Christopher C., Kent P. Mcfarland, Walter G. Ellison and James E. Goetz. 2001. ''Bicknell's Thrush (Catharus bicknelli)'', The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology.〕 Adults are olive-brown on the upperparts, slightly redder on the tail. The underparts are white with gray on the flanks; the breast is greyish brown with dark spots. They have pink legs, a faint grey eye ring, and gray cheeks. They average slightly smaller than the very similar gray-cheeked thrush but are all but indistinguishable in outward appearance. Together, gray-cheeked and Bicknell's thrush form a cryptic species pair, and were indeed formerly considered conspecific.〔〔〔Wallace, G. J. 1939. Bicknell's Thrush, its taxonomy, distribution, and life history. Proc. Boston Soc. Nat. Hist. 41:211-402.〕 The song is a jumbled series of flute-like tones ending on a higher note.〔〔 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「Bicknell's thrush」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.