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 omnivorous, meaning they eat both plants and animals, and their diet can include fruits, nuts, fish, and small mammals. There are several species of bears, such as the American black bear, grizzly bear, and polar bear. Bears are known for their strong bodies, thick fur, and powerful limbs. They have excellent senses, particularly their sense of smell, which is much stronger than that of humans. Bears typically hibernate during the winter months, entering a state of reduced metabolic activity to conserve energy. This behavior helps them survive when food is scarce.