It ranges through eastern Brazil into northeastern Argentina. In southern Brazil it nests on cave walls and in crevices, and its chicks grow gray first feathers.
In southern Brazil hatchlings were naked and blind. Their first gray semiplumes had developed fully by day 13.
At the southern Brazilian study site, the swifts used a cave for roosting and breeding. Nests were placed on horizontal or slightly inclined rock surfaces on vertical walls, or in crevices.
At Anhangava Hill, Paraná, Brazil, nests were compact masses of lichens, bryophytes and fine roots, lined with leaves, thin twigs and feathers.
Of 36 recorded clutches there in 1994–1996, 21 held two eggs. Fresh eggs were unmarked, opaque white.
For 24 cases there in 1994–1995, the incubation period was estimated to average about 24 days.
At one nest followed there in 1995, two marked adults took turns incubating the eggs.
An extinction-risk assessment has not been added yet.