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''Seicercus'' is a genus of Old World warbler formerly in the Sylviidae family but now placed in Phylloscopidae.〔Alström, Per; Ericson, Per G.P.; Olsson, Urban & Sundberg, Per (2006): Phylogeny and classification of the avian superfamily Sylvioidea. ''Molecular Phylogenetics and Evolution'' 38(2): 381–397. PMID 16054402〕 The genus is distributed in the Indian subcontinent and eastern Asia from northern China to Timor in the Lesser Sundas. Many of the more northerly species are migratory, breeding in temperate climates and wintering in the tropics; others are attitudinal migrants, moving down from the mountains in the winter. A few species are migratory over part of their range and resident in others.〔Del Hoyo, J.; Elliot, A. & Christie D. (editors). (2006). Handbook of the Birds of the World. Volume 11: Old World Flycatchers to Old World Warblers. Lynx Edicions. P.p. 675-679 ISBN 84-96553-06-X.〕 The ''Seicercus'' warblers are small passerines that range in size from 9.5–12 cm in length and weigh around 4-9 g.〔 All species have green wings and yellow bellies, most have yellow breasts as well. The head is either grey, green or buff/brown, and all species have stripes on the crown or face as well as a yellow or white eye-ring. The sexes are similar to each other. ''Seicercus'' warblers feed on insects, usually obtained by gleaning and short sally flights.〔 A few species associate with mixed-species feeding flocks. Different species feed in different parts of the forest, some, like the chestnut-crowned warbler feed in the canopy whereas the Sunda warbler prefers the understory and lower canopy. It contains the following species: * White-spectacled warbler (''Seicercus affinis'') * Green-crowned warbler (''Seicercus burkii'') * Chestnut-crowned warbler (''Seicercus castaniceps'') * Sunda warbler (''Seicercus grammiceps'') * Yellow-breasted warbler (''Seicercus montis'') * Martens's warbler (''Seicercus omeiensis'') * Grey-cheeked warbler (''Seicercus poliogenys'') * Alström's warbler (''Seicercus soror'') * Grey-crowned warbler (''Seicercus tephrocephalus'') * Bianchi's warbler (''Seicercus valentini'') * Whistler's warbler (''Seicercus whistleri'') Grey-hooded warbler (''Phylloscopus xanthoschistos'') was formerly included in this genus. ==Taxonomic note== The species known as golden-spectacled warbler ''Seicercus burkii'' (Sibley and Monroe 1990, 1993) has been split into ''S. burkii'', ''S. valentini'', ''S. whistleri'', ''S. soror'' and ''S. tephrocephalus'' following Alström & Olsson (1999) and ''S. omeiensis'' following Martens et al. (1999). ==References== *http://www.birdlife.org/datazone/species/index.html?action=SpcHTMDetails.asp&sid=32281&m=0 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「Seicercus」の詳細全文を読む スポンサード リンク
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