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American dusky flycatcher : ウィキペディア英語版 | American dusky flycatcher
The American dusky flycatcher, or simply dusky flycatcher, (''Empidonax oberholseri'') is a small, insectivorous passerine of the tyrant flycatcher family. The dusky flycatcher is one of many species in the genus ''Empidonax''. These species are very similar in appearance and behavior, and they are notoriously difficult to differentiate. The best characteristics for distinguishing these species are voice, breeding habitat, and range. ==Description== Adults have olive-gray upperparts, darker on the wings and tail, with whitish underparts; they have a noticeable medium-width white eye ring, white wing bars and a medium length tail. The breast is washed with olive-gray. The bill is mainly dark. It is a bit smaller than the gray flycatcher and a bit larger than the Hammond's flycatcher.
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「American dusky flycatcher」の詳細全文を読む
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