A wyvern, known as Viverna in Italian, is a legendary creature with a dragon's head and wings, a reptilian body, two legs, and a tail. A sea-dwelling variant dubbed the sea-wyvern has a fish tail in place of a barbed dragon's tail.
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 and United Kingdom). It is a popular creature in European and British literature, video games, and modern fantasy. The wyvern is often (but not always) associated with cold weather and ice, and it will sometimes possess a venomous bite and rarely have the ability to breathe fire.