Small nightjar of savannas and dry forests, where it forages for insects with characteristic erratic flight like other nighthawks. Key field mark is contrasting pale trailing edge of wings. Often seen in large groups at dusk; when foraging with other species, Least is noticeably smaller. Least Nighthawks and related nighthawks are told from other nightjars by active foraging behavior. Roosts during the day on ground or in small savanna trees.