It would have taken quite a few turns for natural selection to have produced dragons, but if you’re willing to stretch a bit, most classic dragon characteristics do exist in other species. They just don’t come packaged in one animal.
First up on the dragon checklist: flying. Dragon wings are usually depicted in one of two ways—a third pair of limbs connected to the backbone, or webbed forearms. Jack Conrad, a paleontologist and reptile expert at the American Museum of Natural History in New York, thinks the latter is more plausible.