A bear is a large mammal belonging to the family Ursidae. They are found in various habitats, including forests, mountains, and tundras across North America, Europe, and Asia. Bears are known for their strong bodies, thick fur, and powerful limbs. There are eight species of bears, including the American black bear, grizzly bear, and polar bear. Bears are omnivorous, meaning they eat both plants and animals. Their diet can include fruits, nuts, insects, and fish. Bears are also known for their hibernation behavior, where they enter a state of dormancy during winter months to conserve energy when food is scarce.