There are over 155 kinds of owls. However, there are only two different types of owls. Owls with round faces are Strigidae owls. Owls with heart-shaped faces are Tytonidae owls.
Wow! Those are some big words for the types of owls. I wouldn't worry too much about remembering those tough words. Did you know you can click on bold words in order to learn more about it in the glossary?