A Sand Worm
Little is known about the Sand Worms. They can be seen digging though the sand.
The massive worm Ouro was believed to be the only one in existence, but smaller versions of the worms can be found in Outland, called Burrowers, found on the Hellfire Peninsula, and some can also be found in Blade's Edge Mountains. Another species of Sand Worms can also be found south of Auchindron in Terokkar Forest.