Pteranodons are large flying reptiles that lived during the cretaceous period. They have a large beak and a long crest above there heads. They have a long fourth finger that makes up the wing. Their bones are hole which helps them to fly. They live by sea side cliffs because they use the wind to glide. There favorite food is fish. The most notable Pteranodons is the Pteranodon family. They lived near the Western Interior Sea in North America.