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Pterosaurs are flying reptiles that lived during the Mesozoic Era, the same time as dinosaurs and became extinct. Pterosaurs are the earliest reptiles known to have evolved powered flight. Their wings were formed by a membrane of skin, muscle, and other tissues stretching from the legs to a dramatically lengthened fourth finger.
Early species had long, fully toothed jaws and long tails while later forms had a highly reduced tail, and some lacked teeth. Contrary to popular belief, pterosaurs were never dinosaurs, instead belonging to the separate albeit closely related order Pterosauria.
Pterosaurs have been known to be quadrupedal on the ground. The only flying animal that is quadrupedal are bats such as the Vampire Bat.
The Flying Lizard is the only flying reptile alive today after the pterosaurs are extinct.