Birds have developed wings which allow them to be very slow to very fast. The larger birds are somewhat slower, but can glide for long periods of time. Smaller birds are faster, such as the swift that can exceed 100 mph. Fossil evidence shows that some Pterosaurs were small and probably fast. Others were larger and probably slow gliders.
Pterosaurs seem to have the same speed range as modern birds.
It appears, then, that the Pterosaurs were warm blooded, with the same body structure as birds. This made it possible for them to be able to fly and glide the same as modern birds and bats. Inc. All Rights Reserved.