Wyvern

A distant cousin to the true dragons, the wyvern is a huge flying lizard with a poisonous stinger in its tail. A wyvern does not have a strong odor, although its lair might smell of a recent kill. A wyvern's body is 15 feet long, and dark brown to gray; half that length is tail. Its wingspan is about 20 feet. A wyvern weighs about one ton. Wyverns speak Draconic, but usually don't bother with anything more elaborate than a loud hiss or a deep-throated growl much like that of a bull alligator.

Wyverns are rather stupid but always aggressive. They attack nearly anything that isn't obviously more powerful than themselves. A wyvern dives from the air, snatching the opponent with its talons and stinging it to death. A wyvern can slash with its talons only when making a flyby attack. Wyverns have the scent special ability.