Rangers of the North
Warg is the term used to describe the evil wolves who were used as mounts by orcs. They were simply giant wolves that roamed Rhovanion, also known as Wilderland, and the wilds to the east of the Misty Mountains.
Wargs measured about five feet at the shoulder, and could be up to ten feet in length from snout to the tail. Rohan tapestries show the wargs to have a bearlike face with a long muzzle full of huge fangs and a long, prehensile neck; its eyes were small and set back to each side of its head, its ears at the back of the skull. This arrangement gave greatest sensory range while keeping its vulnerable areas protected, and the long neck gave it reach, flexibility and power when biting into flesh. There was a large well muscled hump above its forelegs, that propelled it at high speeds, not only allowing the beast to run swiftly but also smash and tackle prey and foes.
Apart from its ruff, the warg had short dense fur, which would have kept injury from tooth and claw to a minimum. Not all damage could have come from the men and beasts it was attacking; wargs were ferocious and could quickly turn on other members of their pack as well as their handlers. Many warg riders displayed gruesome scars from encounters with their mounts. Coloration and patterning of the fur seems to vary throughout the breed, with mottling and other patterns appearing in shades of red, brown, fawn and liver, with harder patterning appearing toward the back. Powerful haunches and a dewclaw allowed the warg to climb.