National Geographic : 1954 May
© National Geographic Society 685 Kodachrome by Arthur A. Alien Eyes Dilated to Catch Night's Faint Light, Screech Owl Carries a Midnight Snack Screech Owls sleep by day with ear tufts erect as camouflage; they lay tufts back at night. Smallest of the eared owls, they are excellent mousers and insect destroyers. They do not screech, but utter low, tremulous whistles. Some eastern specimens are red-brown, others gray like this June-beetle hunter in his apple tree (opposite).