Owl - nocturnal bird of prey. Predatory birds feed mainly on warm-blooded animals. With the vision of an owl's all right. Except that it is far-sighted, near sees bad, and I do not see very close. Owls have well-developed ears. For birds, which move at high speed through the air, his eyes - the most important sensory organ. Owls swallow everything - and feathers, and bones.