Chimney Swift Similar Species Comparison

Small with slender tube-shaped body and very long, narrow, curved wings. Dark gray-brown overall with a slightly paler throat.

Tube or cigar-shaped body with long curved wings and a short tail. Dark gray-brown overall.

Flies fast, often in loose feeding flocks, with very stiff wingbeats and almost no bend at the wrist. Often gives a chittering call while in flight.

Does not perch, clings to the walls of chimneys and other vertical surfaces with its tiny feet.

Nests in chimneys and on other vertical surfaces in dim, enclosed areas, including air vents, wells, hollow trees, and caves.