The document discusses different types of owls. It notes that owls are birds of prey that are nocturnal. It lists several types of owls including barn owls, great horned owls, snowy owls, and great grey owls. The document questions whether there are over 100 or 155 types of owls and states that the great grey owl is the largest. It confirms that owls are nocturnal and eat small animals like rats. Resources for further information on owls are also provided.