Hunting in packs helps wolves kill large animals such as moose or elk. They are good swimmers and when necessary pursue their prey into water. Timber wolves display remarkable team spirit and cooperation during a hunt. So perfectly is the hunt executed that the pack acts like a single animal. The timber wolf can eat a lot of meat at one meal and then go without food for a considerable time.
Wolves generally pair for life.
Mating takes place in late winter or early spring. Pups are born two months later. Before their birth, the she-wolf chooses a den site in a thicket or amongst rocks and lines her den with dead leaves, moss and hair from her belly. The litter has 3-7 pups. Born blind, their eyes open five to nine days later.