In fact recently, taxonomists reclassified the dog as a subspecies of wolf.
Wolves are the largest living wild canids.
At one time wolves were described as the most widely distributed mammal in the world. Having once occupied ranges across North America, Europe and Asia. There habitats included the high Arctic, tundra, taiga, forests, plains, deserts and practically any ecological niche that could support them. The wolves live in packs, that occupy territories. Some of these territories can range from 40-150 Square miles, and even up to 1000 square miles in the arctic.