spine-tailed swift
bird
Also known as: Chaeturinae
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description
tail
- In apodiform: Size range and diversity of structure
In the spine-tailed swifts, a group that includes the familiar American chimney swift (Chaetura pelagica), the central shaft of the tail feathers extend beyond the vanes (the soft, flat, expanded parts of a feather) into pointed spines. In other swifts, with less specialized tail feathers, the tail…
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