Grizzly bears, also known as Ursus arctos horribilis, are large mammals found primarily in North America. They are characterized by their distinctive hump on the back, which is made of muscle, and their long claws. Grizzlies can weigh between 400 to 1,500 pounds and can stand up to 8 feet tall when on their hind legs. They typically inhabit forests, mountains, and tundra regions. These bears are omnivorous, meaning they eat both plants and animals. Their diet includes berries, roots, fish, and small mammals. Grizzly bears are known for their powerful sense of smell, which helps them locate food from great distances. They hibernate during the winter months, often in dens dug into the ground.