In the owl world, you"re either a member of the Strigidae or Tytonidae. That might sound like two warring houses from "Game of Thrones," but these are the two families of classification that make up the 200+ species of owls around the world. The Tytonidae family includes barn owls, which have distinct heart-shaped facial disks, while the larger Strigidae family consists of true (or typical) owls, most of which have round faces.