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« Why do bears hibernate » Bears hibernate as a survival strategy during the winter months. When food becomes scarce and temperatures drop, bears enter a state of hibernation to conserve energy. Hibernation allows them to lower their metabolic rate, heart rate, and body temperature, minimizing their need for food and reducing exposure to harsh winter conditions. By relying on stored body fat, bears can sustain themselves until spring when food sources become abundant again. Hibernation also offers protection from predators and ensures their survival in challenging environments.