Although slow breeders, American black bears reproduce faster than brown bears, which helps them sustain hunting and other pressures. In late summer and fall, American black bears wander far and wide searching for high-protein foods such as acorns. In areas of heavy hunting, however, they adapt to nighttime hours. American black bears, except for females with young, generally forage alone. Adult males do not tolerate other bears, except during breeding season.
Females tolerate other bears except for unrelated females.
In the west, this bear competes for food, and is an occasional predator of black bears. Bobcats live in a variety of habitats, from forest to marsh to scrub. In the north and west, American black bears often share habitat with the largest North American deer. Rarely, the bears catch and eat young moose. A mighty, predominantly western, winged predator that hunts rabbits, marmots, and other small animals, and rarely young deer.