Hemiprocnidae

This small family has only three members, all confined to south-east Asia and north Melanesia. As their name suggests, treeswifts spend much of their time perching in trees, as their legs are much stronger than those of the true swifts (Apodidae), from which they also differ in having longer wings and tail. From these high perches, they make dashing sorties in pursuit of flying insects, returning to the same spot presumably to digest their meal. The shallow cup of a nest is attached to a branch, and is largely hidden by the incubating adult.

Flight:

Rapid wing beats followed by long glides or swoops