Pteranodons were a dinosaur that appeared in Jurassic Park II and Jurassic Park III. They had the ability to fly. In Jurassic Park II (The Lost World) the audiance only saw a few Pteranodons for a moment at the end. But in Jurassic Park III, the Pteranodons almost killed Eric Kirby and Billy Brennan. They chased Alan Grant, Mr. and Mrs. Kirby, and Eric Kirby out of a large birdcage-like structure, and attacked Billy as he was dragged down a river. At the end of the third movie, Three Pteranodons were seen flying throught the clouds.