I'm curious. I've known that winged dragons are a common staple in folklore and legends in medieval Europe, but until recently I had no idea whether European winged dragons were based on fossils of extinct Mesozoic marine reptiles or pterosaurs. However, the pterosaur fossils found in Europe bear uncanny resemblance to the wyvern of English folklore. Is it possible that Europeans came upon specimens of pterodactyls when they crafted folktales about winged dragons?