Nocturnal animals are those that sleep during the day and are active at night. They have special adaptations like big eyes, ears, and a strong sense of smell to help them navigate and hunt at night. Examples of nocturnal animals include bats, owls, and badgers. Bats have fur and wings and can fly. Owls are birds of prey with excellent night vision. Badgers live underground in burrows and come out at night to feed.