The gray wolf lives in packs of 8 to 35 members in northern forests. They hunt large prey like deer and moose. Newborn pups are blind and dependent on their mother's milk. As pups mature over 3 to 5 months, they begin to travel and hunt with the pack. Gray wolves communicate through howling and mark their territory with scent and tracks. Their population was threatened by hunting but is now recovering in parts of the United States and Canada under protections.