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The dusky thrush (''Turdus eunomus'') is a member of the thrush family Turdidae which breeds eastwards from central Siberia. It is closely related to the more southerly breeding Naumann's thrush ''T. naumanni''; the two have often been regarded as conspecific. This species breeds in open woodland areas, but unlike Naumann's thrush, the dusky thrush is more tolerant of mountainous and tundra-edge habitats. This species is strongly migratory, wintering south to southeast Asia, principally in China and neighbouring countries. It is a rare vagrant to western Europe. It nests in trees, laying 3-5 eggs in an untidy but neatly lined nest. Migrating birds and wintering birds often form small flocks. It is omnivorous, eating a wide range of insects, especially mosquitoes, earthworms and berries. This is a medium-sized but stocky thrush, reminiscent in structure of a small fieldfare. The underwing is reddish brown, and there is a pale supercilium. Dusky thrush has a dark brown back and rump; the face, breast, and flank spots rump are black and the belly and undertail are white. Naumann's thrush in comparison has a paler brown back and head; the face, breast, flank spots and rump are reddish, and the belly and undertail are white. The female is fairly similar to the male, but immatures have a weaker patterning. The male dusky thrush has a simple fluted or whistling song, similar to the redwing. There are suggestions that the songs of dusky and Naumann's thrush differ. ==References== ==Bibliography== * ''Thrushes'', Clement and Hathway, ISBN 0-7136-3940-7 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「Dusky thrush」の詳細全文を読む スポンサード リンク
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