Pterodactyls (or pterosaurs) were very diverse—there were plenty of different species with different adaptations, living in different habitats.
The Pteranodon
One example would be the Pteranodon. It lived in coastal areas and fed on fish, so it had long, slender wings to fly long distances over the sea, a long beak to catch fish, and a throat pouch like a pelican to store fish.
The Quetzalcoatlus
Quetzalcoatlus, on the other hand, lived inland, and fed on land animals, so it had short wings (because it spend most of its time on land), a long neck and a huge beak to catch small animals, and long legs to walk and run more effectively than other pterosaurs.
