Thousands of years ago, domestic dogs split off from wild wolves -- we can still see common behaviors in both animals, such as stalking, hunting and playfulness. But life in a wolf pack is extremely regimented to maximize the chances for survival. Take the wolf quiz and see if you're the leader of the (knowledge) pack.
Wolves are native to North America, Europe and Asia, although they became extinct in many of their habitats because of human encroachment and hunting.
Injured or subordinate wolves may leave the pack to escape bullying from the other members.
The omega wolf is the lowest-ranking wolf in a pack, subordinate to all other pack members.
Specialists relocated 29 wolves from Alberta, Canada, to Yellowstone National Park in 1995.
The International Wolf Center recommends not approaching any wolf closer than 300 feet (91 meters), not turning your back on it, and waving your arms and making noise to show your dominance.
Wolf packs rarely have more than one female member, because they are extremely aggressive with each other.
As a display of dominance, alpha wolves will urinate standing up rather than squatting.
Wolves do not technically howl at the moon. Since they're largely nocturnal, it might appear that wolves are howling at the moon when in fact they're just communicating with other pack members.
Ellis assumed the lowest rank, the omega wolf, while living with the pack in England's Combe Martin Wildlife and Dinosaur Park.
In most wolf packs, only the alpha male and female mate.