An aerial feeder with a rapid and erratic flight; typically found feeding low over open habitats. Its black-and-white plumage, long slim wings, and long forked tail are unique within its range. Chimney Swifts are entirely gray and have shorter, wider wings and a stubbier tail. Swallows can be distinguished from Antillean Palm-Swift, even at a distance, by flight style—swallows lack the snappy wingbeats of the palm swift. Call is a high, metallic twitter.