A Contribution to The Breeding Biology of The Palm-Swift, Cypselus Parvus.

Abstract

The subspecies of Cypselus parvus show differences in nestshape, nest-material and clutch size. At Amani nests of C.p. myochrous are mainly of feathers, with plant floss of several species, all stuck together with saliva. Among the feathers those from the breast of species of the pigeon family are prominent but a number of other birds have been identified as contributing. At Amani the eggs are always stuck to the nest directly they are laid (process described), a safety device entirely necessary because the nest is a vertical pad with a mere flange, narrower than the egg-length, at its lower edge.