The Cave Swallow, Petrochelidon fulva, belonging to the same genus as the more familiar and widespread Cliff Swallow of North America, occurs in Mexico and the Greater Antilles, with fall and winter vagrants reaching the East and Gulf Coasts of the U.S..

The Cave Swallow measures from 12 to 14 cm in length and weighs 19 g on average. It has grey-blue upperparts and brown-tangerine forefront and throat.

There are two races in the southern U.S.; one fulva in Florida, and one pelodoma in the states of southwestern United States, and Northeast Mexico. The Cuban race cavicola is very similar to fulva.