Although owls may look calm and passive, they're actually efficient and stealthy birds of prey.
They're nocturnal or crepuscular - this means they're active during the night or twilight hours. Their fluffy feathers make their flight almost silent and they use their sharp eyesight to hunt in the dark.
Owls also use an impressive sense of hearing to help them find their food, which is mostly small mammals, insects and even other birds.
There's around 200 species of owls in the world, found in a huge range of habitats from rainforests to the arctic tundra.