This small swift is endemic to Sao Tome and Principe. It feeds on the wing and is marked by a pale rump band and a streaked underside.
The back is blackish brown, with a broad pale band on the rump. The throat is brown, and dark streaks stand out on the whitish underside. The tail is square-ended.
It catches insects and small beetles in flight around forests and forest edges. It feeds in small groups and may join Little Swifts on Principe.
It nests singly in a tree hollow, building an open cup-shaped nest.
Breeding is recorded in August and October on Sao Tome and in September on Principe.
The wing bulges in the middle and hooks in the outer part.
An extinction-risk assessment has not been added yet.