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The saw-wings, ''Psalidoprocne'', is a small genus of passerine birds in the swallow family. The common name of this group is derived from the rough outer edge of the outer primary feather on the wing, which is rough due to recurved barbs. The function of this is unknown. The birds are 11–17 cm long and black or black-and-white in colour. The genus has an African distribution and all species can be found foraging over forest and woodland.〔 ==Species list== There are at least five species of saw-wing. The black saw-wing has a large number of subspecies and many of these are sometimes considered to be separate species.〔(【引用サイトリンク】url=http://ibc.lynxeds.com/species/black-saw-wing-psalidoprocne-pristoptera )〕 The species, in taxonomic order, are: *Square-tailed saw-wing ''Psalidoprocne nitens'' *Mountain saw-wing ''Psalidoprocne fuliginosa'' *White-headed saw-wing ''Psalidoprocne albiceps'' *Black saw-wing ''Psalidoprocne pristoptera'' * *Shari saw-wing ''Psalidoprocne (pristoptera) chalybdea'' * *Petit's saw-wing ''Psalidoprocne (pristoptera) petiti'' * *Mangbettu saw-wing ''Psalidoprocne (pristoptera) mangbettorum'' * *Ethiopian saw-wing ''Psalidoprocne (pristoptera) oleaginea'' * *Blue saw-wing ''Psalidoprocne (pristoptera) pristoptera'' * *Brown saw-wing ''Psalidoprocne (pristoptera) antinorii'' * *Blanford's saw-wing ''Psalidoprocne (pristoptera) blanfordi'' * *Eastern saw-wing ''Psalidoprocne (pristoptera) orientalis'' * * *Includes the race ''reichenowi'' * *Black saw-wing ''Psalidoprocne (pristoptera) holomelas'' * * *Includes races ''massaica'' and ''ruwenzori'' *Fanti saw-wing ''Psalidoprocne obscura'' 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「Saw-wing」の詳細全文を読む スポンサード リンク
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