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Ashy-tailed swift
The ashy-tailed swift (''Chaetura andrei'') is a swift which is endemic to northern and central Venezuela.
The taxonomy of this group is confusing. The larger and far more widespread Sick's swift was previously regarded as a subspecies of the ashy-tailed swift, but Marín (1997) found that Sick's swift was closer to the chimney swift. Marín further suggested that the ashy-tailed swift was identical to Vaux's swift of the subspecies ''aphanes''. If following this approach, ''andrei'' (with ''aphanes'' as a junior synonym) becomes a subspecies of Vaux's swift. This, however, is considered mistaken by Restall ''et al.'' (2006), where it is mentioned that they, while virtually identical under normal field conditions, actually do differ and also have different behavior and habitat preferences (ashy-tailed swift prefers forested lowland rivers, while Vaux's swift race ''aphanes'' prefers mountain slopes).
==External links==
* Marín, M. (1997). ''Species limits and distributions of some New World Spine-tailed Swifts (Chaetura spp.). Ornithological Monographs 48: 431-443.
* Restall, R., M. Rodner, & M. Lentino (2006). ''Birds of Northern South America. Vol. 1: Species Accounts''. Christopher Helm. ISBN 0-7136-7242-0
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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