When you think of an owl`s voice, you think of agentle,quivering hoohoo. However, not all owls sound the same not even close. The characteristic hoot belongs tothe great horned owl, but there`s more to hear. The barn owl, for instance, emits a harsh screeching sound just like a squeaking door.Meanwhile, the barred owl sounds almost more like the neigh of a horse than any vocalisation you`d expect from a bird.