We have a pair of Great Horned Owls that frequent a tree outside our house. The hoooot-ing is much louder than I expected, but is a nice sound. They are welcome to all the moles, voles and mice they can catch! So far, we have only seen them sitting in the tree swiveling their heads around to look for dinner. It is difficult to get a good photo of them as they come at dusk and in the dark.