A great horned owl.
horned owl definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of several owls having two projecting tufts of feathers on the head
horned owl definition by American Heritage Dictionary
Any of various owls with characteristic ear tufts that resemble horns.