<human>: Is there any information available about the pterosaurs?
<bot>: Yes, there is a lot of information about pterosaurs. They were a group of flying reptiles that lived during the Mesozoic Era, between 252 and 66 million years ago. Pterosaurs were the first vertebrates to fly, and they had wings made of skin supported by a membrane of tissue. They were also the largest animals in the air at the time.