Wolverine

A wolverine is a creature similar to a badger — but they are bigger, stronger, and even more ferocious. A wolverine that takes damage in combat flies into a berserk rage, clawing and biting madly until either it or its opponent is dead. The creature cannot end its rage voluntarily. Some druids choose them as their animal companion.

Species

 * Dire wolverine: A larger variety of wolverine. Some druids choose them as their animal companion.

Wolverine Ancient
The Wolverine guardian may be connected to the Wolvar, the humanoid wolverine race that appear in Wrath of the Lich King.