Aerial landbirds include nightjars, hummingbirds, swifts, and swallows. These birds generally feed on the wing. In other words, while flying. All eat insects, though hummingbirds also feed on nectar.

Nightjars include mostly crepuscular birds such as nighthawks and whip-poor-wills. Hummingbirds and swallows are well-known. Swifts are so adapted to flight and their feet so weak that they are unable to perch on wires, branches, or the ground. Thus they only rest by clinging to crevices in cliffs, the inside of hollow trees, or chimneys.