European dragons exist in folklore and mythology among the overlapping cultures of Europe. Dragons are generally depicted as living in rivers or having an underground lair or cave. They are commonly described as having hard or armoured hide, and are rarely described as flying, despite often being depicted with wings. Some modern pseudo-biological accounts of dragons give them the generic name Draco, although the generic name Draco is used in real-world biology for a genus of small gliding agamid lizard. An infectious disease called Dracunculiasis, caused by infection with the Guinea worm which grows up to 3 feet (0.91 m) long before emerging from its host, also derives its name from dragons (literally "infestation with little dragons"), based on the burning pain experienced by sufferers.
