Although pterosaurs glided above Cretaceous seas in search of food, they were reptiles, not birds. The type of Pterosaur found in Kansas is called the Pteranodon, which is the most commonly found pterosaur anywhere. It had a toothless beak and very short tail. The largest Pteranodon fossil from Kansas has a wingspan of 26 feet. Like birds, they had hollow bones filled with air. Mature males had long, crested skulls. Females also had a crest on their head, but it was much shorter.