The Dire Wolf, whose scientific name is Canis dirus, was the largest canine ever to exist. They lived in the Pleistocene Epoch and were located in North America.
The Dire Wolf was much like the Gray Wolf, or Canis lupis. It, however, had a larger body and its teeth were much greater in size. Also, the dire wolf's legs were slightly shorter and stockier than other wolves. Fossils of this animal are often clustered together, which, as well as comparisons with the modern wolf, suggest it was probobly a pack animal.