There are two species of loups in North America. The smaller species is the red wolf, Canis rufus, which has shorter, redder fourrure than the gray wolf. The gray wolf, Canis lupus, has thicker fourrure which is plus gray ou golden, and is larger than the red wolf. The gray loup lives in the northeastern United States, Canada, and Europe. The red loup lives in the southeastern United States.
There are many subspecies of the gray wolf, such as the arctic wolf, a white subspecies which lives in Alaska and northern Canada, and the Mexican wolf, a smaller subspecies which has been recently reintroduced in parts of the southwestern United States.