The main diet of a bear varies depending on the species and the season; however, most bears are omnivorous. They consume a mix of plant material, fruits, nuts, and small mammals, which allows them to adapt to various habitats. For instance, black bears enjoy berries, roots, and insects, while polar bears primarily hunt seals. In spring, bears often indulge in fresh greens, while summer and fall offer rich fruit sources. The diversity in their diet enables them to store fat for hibernation during winter months, which is crucial for their survival during periods of food scarcity.