Carnivorous, feeding principally on fish, but also takes crayfish, frogs, molluscs, insects and terrapins.
Up to 13 years in the wild and around 20 years in captivity.
Sexually mature at 2 years. Mating occurs between March and April. The 2-3 cubs are generally born between March and April after a delayed implantation (7½-10½ months) followed by an active gestation period of 2 months, and are weaned after 12-16 weeks.
Gray wolf, coyote, Canadian lynx, bobcat and great-horned owl.