单词	chimney swift
释义	chimney swift noun The common swift (bird) of the eastern part of North America, with mainly dark grey plumage. Chaetura pelagica, family Apodidae. For example, the wing loading of a highly maneuverable bird such as the chimney swift is ten times smaller than that of the aeronautically challenged common loon.... The chimney swift is the most widely distributed and plentiful swift in North America, especially east of the Mississippi River. At least one species of swift, chimney swifts are cooperative breeders.
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