Wyverns are the smaller versions of Dragons with other differing features. They, unlike Dragons, have two legs, and where their front legs would be are wings. They have a venomous bite, which can paralyze a Behemoth.
Their breath attacks aren't very intense, but what they lack in magic and sheer strength, they make up for in speed and abstract thinking. They're very interested in the affairs of Humanoid races, and can often be found in larger cities' libraries.
They're peaceful, but very temperamental. They often snap at Humans for being in the way. However, they rarely resort to violence.