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''Wilsonia'' is a small genus of New World warblers which breed in North America. They are migratory, wintering south of their breeding ranges in Central America, the West Indies or South America. The three species are: * Hooded warbler, ''Wilsonia citrina'' * Wilson's warbler, ''Wilsonia pusilla'' * Canada warbler, ''Wilsonia canadensis'' The hooded warbler is now included in ''Setophaga'', while Wilson's and Canada are included in ''Cardellina''. ''Wilsonia'' warblers are long. They have yellow underparts and black head markings in at least the adult male plumage. Two species have plain olive green-brown back, but the Canada warbler has grey upperparts and is also migrates much further than the other species in the genus. The breeding habitat is broadleaved woodlands with dense undergrowth. These birds nest low in a bush or on the ground, laying 3–6 eggs in a cup nest. ''Wilsonia'' warblers feed on insects, often caught by flycatching, and they have distinctive songs and loud ''chip'' calls. ==Taxonomy== Some authorities suggest that the genus ''Wilsonia'' should include the red-faced warbler, which is generally put in the genus ''Cardellina''. Recent genetic research has however suggested that the type species of ''Wilsonia'' (hooded warbler ''W. citrina'') and of ''Setophaga'' (American redstart ''S. ruticilla'') are closely related and should be merged into the same genus. As the name ''Setophaga'' (published in 1827) takes priority over ''Wilsonia'' (published in 1838), hooded warbler would then be transferred as ''Setophaga citrina''. Where this is accepted, the other two ''Wilsonia'' species are then transferred to their next-most closely related genus, ''Cardellina''.〔Lovette, I. J. et al. (2010). A comprehensive multilocus phylogeny for the wood-warblers and a revised classification of the Parulidae (Aves). ''Molecular Phylogenetics and Evolution'' 57 (2): 753-770. (Abstract )〕 This change has been accepted by the North American Classification Committee of the AOU,〔Chesser, R. T. et al. (2011). Fifty-Second Supplement to the American Ornithologists’ Union Check-list of North American Birds. ''Auk'' 128 (3): 600-613 (fulltext )〕 and the IOC, however the South American Classification Committee of the AOU continues to keep Wilsonia in use. This genus was named to commemorate the American ornithologist Alexander Wilson. 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「Wilsonia (bird)」の詳細全文を読む スポンサード リンク
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