BLACK SWIFT.—Family Micropodidæ.
422. Cypseloides niger borealis. 7 inches.
The plumage of the Swift is a dull sooty black, somewhat lighter on the under parts. The tail is slightly forked and does not have the spines which are usual with this family. Although the general habits of this species are well known, but little is known of their nesting; they are seen during the breeding season about the higher ranges of their United States range, and are supposed to nest in the crevices of cliffs at high altitudes.