This swallow ranges in Mexico, Cuba, and the West Indies. The male has a sharp boundary between its blue-purple back and white belly, while the female and juvenile blend brown feathers into the white. It catches insects in flight near water.
Both sexes have dark blue to purple upperparts and a white belly. The male has a sharp boundary between the colors, while brown feathers blend gradually into white on the female and juvenile. The bill is black and the wings are long and pointed.
It catches insects in flight near water or shorelines and is often seen flying in groups. Nests made of plant material may be placed in cliff crevices, old woodpecker holes, palms, or telephone poles.
An extinction-risk assessment has not been added yet.