Ursus arctos, commonly known as the brown bear, is a large mammal found in various habitats across North America, Europe, and Asia. They are characterized by their robust body, thick fur, and powerful limbs. Brown bears can weigh between 300 to 1,500 pounds, depending on the subspecies and their environment. These bears are omnivorous, feeding on a diverse diet that includes plants, berries, fish, and small mammals. They are known for their hibernation behavior, where they enter a state of dormancy during winter months to conserve energy. Brown bears play a crucial role in their ecosystems by helping to maintain the balance of their habitats.