The Bahama Swallow (Tachycineta cyaneoviridis) is a bird species that breeds only on three islands in the northern Bahamas: Grand Bahama, Abaco, and Andros. Like all other species it the Tachycienta genus, it is an obligate secondary cavity nester, which means that it needs a preexisting cavity in which to build its nest. This species primarily uses abandoned woodpecker cavities in dead pine trees and other structures, but it will also utilize other types of available cavities. Swallows feed on aerial insects as they fly, which is why they have a very distinctive flight pattern, often swooping quickly over roadways and other open areas.
Research on this species is very limited, but population estimates indicate that numbers have declined steeply over time (Emlen 1977, Smith and Smith 1989, Allen 1996). The reasons for decline are not entirely clear, but may be attributed to habitat loss and the introduction of invasive species (Allen 1996). The Bahama swallow is currently classified as “Endangered” on the IUCN Red List.