Birds that come out only at night 

Nightjar The term nightjar refers to a group of 79 birds that fly at night or the hours around twilight.

Owl Owls are amazingly evolved for nighttime activity.

Barn owl Like many owls, the barn owl is nocturnal across most of its range although in the UK it sometimes hunts during the day.

Night Heron Birds of the night usually have large eyes, camouflaged plumage, and enhanced senses.

Eastern whip-poor-will The eastern whip-poor-will is a strictly nocturnal bird and species of nightjar.

Barred Owl It's no surprise that owls are vocal at night, and the barred owl has a distinctive and very loud hooting call

Great horned owl This Great Horned Owl is making use of its camouflage to hide during the daylight hours.

Northern mockingbird Northern Mockingbirds sometimes appear never to get sleep.