A wyvern ( WY-vərn, sometimes spelled wivern) is a legendary bipedal dragon with a tail often ending in a diamond- or arrow-shaped tip. The wyvern in its various forms is important to heraldry, frequently appearing as a mascot of schools and athletic teams (chiefly in the United States, United Kingdom, and Canada). It is a popular creature in European literature, video games, and modern fantasy. The wyvern in heraldry and folklore is rarely fire-breathing like the four-legged dragon. Sometimes modern fantasy book and media authors portray wyverns that are frost-breathing or poison-breathing instead of fire-breathing.
