The Tawny Owl is Britain’s commonest owl and is the owl that is associated with the classic twit-two or hoot sound, although they make a variety of other calls including a murderous screech. The Tawny Owl is a skilled hunter and seeks prey almost exclusively at night, taking a variety of small birds from their roosts along with small mammals. They will also eat insects and worms and have even been known to catch fish from ponds and rivers. The Tawny Owl is aggressively territorial when breeding and will attack other creatures that approach their nest sites and amazingly have been known to injure humans on several occasions. Tawny Owls are highly nocturnal, roosting in trees during the day when their presence may be noted by the loud taunts of mobbing birds.