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''Theristicus'' is a genus of birds in the Threskiornithidae family. They are found in open, grassy habitats in South America. All have a long, decurved dark bill, relatively short reddish legs that do not extend beyond the tail in flight (unlike e.g. ''Eudocimus'' and ''Plegadis''), and at least the back is grey. ==Taxonomy== Formerly, ''T. caudatus'' included ''T. melanopis'' as a subspecies, but today all major authorities accept the split. Furthermore, it has recently been suggested that the taxon ''branickii'' should be considered a species, but at present most authorities maintain it as a subspecies of ''T. melanopis''. * Plumbeous ibis, ''Theristicus caerulescens'' * Buff-necked ibis, ''Theristicus caudatus'' * Black-faced ibis, ''Theristicus melanopis'' * * Andean ibis, ''Theristicus (melanopis) branickii'' 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「Theristicus」の詳細全文を読む スポンサード リンク
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