wolfs

The gray wolf or grey wolf, also known as the timber wolf

wolves

Gray wolves range in color from grizzled gray or black to all-white. As the ancestor of the domestic dog, the gray wolf resembles German shepherds or malamutes. Though they once nearly disappeared from the lower 48 states, today wolves have returned to the Great Lakes, northern Rockies and Southwestern United States.

The Grey Wolf / Gray Wolves Hunting In the Wild [Animal Nature Wildlife Documentary]
BBC Natural World: Wolf Pack - Full Documentary