Nocturnal hunters are animals that hunt during the night. OWLS and hootowls are two examples of nocturnal hunters. OWLS are four-letter birds of prey that are known for their distinctive call and large eyes, which help them to see in the dark. Hootowls are eight-letter birds of prey that are related to OWLS and share many of the same characteristics. They are also known for their loud calls and excellent night vision.