A
wyvern (or
wivern) is a winged
reptilian mythical beast often found in
Medieval heraldry. It is similar to a
European dragon, but it differs in that it has only two legs, cannot breathe fire, and has a barbed or snake-like tail. Occasionally, it is said to be smaller than a dragon or to be able to breathe fire. In heraldry, it represents pestilence, conquest, or other such ideas.
Another mythical creature that is similar to the wyvern is the cockatrice[?]. Variants of the wyvern include the sea-wyvern, which has a fish-like tail, and the lindworm, which either has no legs (commonly) or no wings.
Wyverns are also featured in many fantasy settings. In Dungeons & Dragons, wyverns have a poisonous tail stinger.
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