Chestnut-collared Swifts are aerial insectivores, but the diet is not known in detail; it includes ants and termites, beetles, bugs, and wasps (Stiles and Skutch 1989). The stomachs of two specimens from northern Venezuela were full of winged ants (Camponotus, Solenopsis, and Crematogaster) (Beebe 1947). In Colombia it has been observed in mixed species aggregations of swifts feeding on swarms of emergent small beetles (Scarabeidae: Cichlocephala sp., Cycloneda sp., and Macrodactyus sp.) (Stiles and Negret 1994). Nestlings on Trinidad were fed Hymenoptera (including ants) and termites (Collins 1968).