How Many Nocturnal Birds Are in Maryland? Among the most commonly found nocturnal birds in Maryland are the Eastern Screech-Owl, Barred Owl, Great Horned Owl, and Barn Owl. These owls are skilled hunters with excellent night vision and a keen sense of hearing, making them effective predators of small mammals, insects, and birds. The Northern Saw-whet Owl, though smaller and more elusive, is also occasionally spotted during certain times of the year.