NOCTURNAL CHICK PROVISIONING BY BLACK SWIFTS

Abstract

The Black Swift, Cypseloides niger, is the single North American breeding species in the Cypseloidinae, a mostly tropical New World subfamily of swifts (Apodidae). Members of this subfamily have the well-known habit of nesting on damp, dark rock surfaces near or behind waterfalls (Knorr 1961, Collins 1968, Marin and Stiles 1992).