Owls are nocturnal birds known for their distinctive round faces, large eyes, and silent flight. They belong to the order Strigiformes, which includes over 200 species. Owls are found in various habitats worldwide, from forests to deserts, and they primarily hunt small mammals, birds, and insects. These birds have excellent night vision and can rotate their heads up to 270 degrees, allowing them to see in multiple directions without moving their bodies. Owls are also known for their unique calls, which vary by species and are often used for communication and territory marking.