Large eyes positioned at front are most appropriate for a nocturnal bird. But since these birds feed at different times, they rarely compete directly with each other.
Most birds have keen eyesight and are considered day birds, as they are active during the daytime.
However, a minority of birds are more active during the night. Nocturnal birds have special characteristics that the daytime birds do not. Unlike the day birds, nocturnal birds have large eyes in front, a distinctive feature of owls, to help them see better in limited light. The herons, the jungle crow, carrion crow, gray starling, and the white wagtail sleep in large groups easily spotted by many people. However, many birds sleep individually or in small groups when it is not the mating season.