Another one of their adaptations is that they have very good hearing. They can hear another wolf howl from five miles away. They can also hear their prey, like caribou, coming from far away. Wolves howl and bark to get other wolves that aren't in the pack away from their food, or out of their territory. Each wolf has a different sounding bark and howl.
Wolves come in many different colors and sizes.
Most Arctic wolves are all white, but they can be gray or black, and usually have a mark somewhere on their body. No wolf looks exactly like another. They have about 20 top teeth, and 22 bottom teeth when they are full-grown.