Carnivorous , feeding principally on mammals such as deer, Canadian beaver, bighorn sheep, river otters, but also eats fish, birds, insects, fruit and carrion.
Around 6 to 8 years in the wild and up to 15 years in captivity.
Sexually mature at 1 to 2 years. Mating occurs between February and March. The 5-6 pups are born between April and May after a gestation period of 9 weeks, and are weaned after 5-8 weeks.
Gray wolf, cougar, Canadian lynx, bobcat and black bear; young may also be taken by golden eagle.