A dragon is a large, serpent-like legendary creature that appears in the folklore of many cultures around the world. Beliefs about dragons vary drastically by region, 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.
The earliest attested dragons resemble giant snakes. Dragon-like 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. Famous prototypical dragons include the mušḫuššu of ancient Mesopotamia, Apep in Egyptian mythology, Vṛtra in the Rigveda, the Leviathan in the Hebrew Bible, Python, Ladon, Wyvern, and the Lernaean Hydra in Greek mythology, Jörmungandr, Níðhöggr, and Fafnir in Norse mythology, and the dragon from Beowulf.