A dragon is a large, serpentine, legendary creature that appears in the folklore of many cultures. Beliefs about dragons vary through regions, but dragons in western cultures since the High Middle Ages have often been depicted as winged, horned, four-legged, and capable of breathing fire. Dragons in eastern cultures are usually depicted as wingless, four-legged, serpentine creatures with above-average intelligence.
Commonalities between dragons' traits are often a hybrid of feline, avian, and reptilian features, and may include: snakelike features, reptilian scaly skin, four legs with three or four toes on each, spinal nodes running down the back, a tail, and a serrated jaw with rows of teeth.
The earliest attested reports of draconic creatures resemble giant snakes. Draconic creatures are first described in the mythologies of the ancient Near East and appear in ancient Mesopotamian art and literature. Stories about storm-gods slaying giant serpents occur throughout nearly all Indo-European and Near Eastern mythologies.
The popular western image of a dragon is likely based on a conflation of earlier dragons from different traditions, and of inaccurate scribal drawings of snakes. In western cultures, dragons are portrayed as monsters to be tamed or overcome, usually by saints or culture heroes, as in the popular legend of Saint George and the Dragon. They are often said to have ravenous appetites and to live in caves, where they hoard treasure.
(Commonly depicted dragon from western cultures)
(Commonly depicted dragon from eastern cultures)