Umber Hulks are usually black, although it becomes more of a yellowish gray on their bellies. Wolves are active and cunning carnivores, capable of surviving in nearly every climate known. Although the colour of their fur varies from species to species based on the climate in which they dwell, all wolves have some features in common. They are all characterised by powerful jaws and teeth, bushy tails, and round pupils. In many respects, wolves greatly resemble domesticated dogs.
Dire wolves are for all intents and purposes an ancestor of the more typical wolf.
Apart from being generally large in size, they are very similar to their descendants. Wargs speak a primitive language and are as large as ponies. Winter Wolves are the most dangerous of the wolf species. They are exceptionally large and incredibly vicious. Fortunately, they are encountered very rarely, primarily due to the freezing terrain which they usually inhabit.