Pterosaur

Pterosaurs are unique among flying animals in having a completely different wing structure of other flying animals. While avians use their feathers for flight and bats and dragons have a weblike coating between their fingers, pterosaurs instead have a massive flap of skin connecting the last finger on the hand to the ankle. Within these wings contain small air like sacs allowing them to better produce lift.

By having only a singular finger devoted to flight pterosaurs still have three useable fingers on their forearms, allowing them to manipulate objects and even gallop on all fours in a strange gait.

Pterosaurs are primarily separated within tow main distinct groups. "Old" and "new" pterosaurs. Old pterosaurs are a more primitive version recognized by shorter necks, long tails often ending in an arrow-like point, a mouth filled with needle-like teeth, and are usually far smaller. New pterosaurs on the other hand have considerably reduced tails, long necks, and massive heads usually lacking teeth often featuring elaborate crests to form as a rudder for steering.

Within these groups there are far more specific groups that all behave differently and fill various roles within their ecosystems.