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''Antrostomus'' is a genus of nightjars formerly included in the genus ''Caprimulgus'', but evidence suggested the genus be split.〔Han et al. (2010)〕 They are medium-sized nocturnal birds with long pointed wings, short legs and short bills. ''Antrostomus'' nightjars are found in the New World, and like other nightjars they usually nest on the ground. They are mostly active in the late evening and early morning or at night, and feed predominantly on moths and other large flying insects. Most have small feet, of little use for walking, and their soft plumage is cryptically coloured to resemble bark or leaves. Some species, unusually for birds, perch along a branch, rather than across it, which helps to conceal them during the day. Temperate species are strongly migratory, wintering in the tropics. ''Antrostomus'' species have relatively long bills and rictal bristles. Many have repetitive and often mechanical songs. ==Species== *Chuck-will's-widow ''Antrostomus carolinensis'' *Rufous nightjar, ''Antrostomus rufus'' *Cuban nightjar, ''Antrostomus cubanensis'' *Hispaniolan nightjar, ''Antrostomus ekmani'' *Tawny-collared nightjar, ''Antrostomus salvini'' *Yucatan nightjar, ''Antrostomus badius'' *Buff-collared nightjar, ''Antrostomus ridgwayi'' *Eastern whip-poor-will, ''Antrostomus vociferus'' *Mexican whip-poor-will, ''Antrostomus arizonae'' *Dusky nightjar, ''Antrostomus saturatus'' *Puerto Rican nightjar, ''Antrostomus noctitherus'' *Silky-tailed nightjar, ''Antrostomus sericocaudatus'' 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「Antrostomus」の詳細全文を読む スポンサード リンク
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