Adult male brown bears weigh anywhere from 400 to 1,200 pounds, while females weigh from 300 to 800 pounds, depending on the subspecies. A female weighs roughly half the weight of a male. The heaviest brown bear ever recorded is 2,500 pounds,
Brown bears sit at the top of the food chain in their environment, but most of their diet includes plants, grass, berries and nuts. They weigh the most when they prepare to hibernate for the winter, and they weigh considerably less when they emerge from hibernation. A subspecies, Kodiak bears, are the largest of the group and can weigh over 1,500 pounds.