	The chimney swift ("Chaetura pelagica") is a bird belonging to the swift family Apodidae. A member of the genus "Chaetura", it is closely related to both the Vaux's swift and the Chapman's swift; in the past, the three were sometimes considered to be conspecific. It has no subspecies. The chimney swift is a medium-sized, sooty gray bird with very long, slender wings and very short legs. Like all swifts, it is incapable of perching, and can only cling vertically to surfaces.