Animals that hibernate during winter are commonly referred to as "hibernators." These species, including bears, squirrels, and bats, enter a state of deep sleep or torpor, which allows them to conserve energy and survive harsh winter conditions. During hibernation, an animal's metabolic rate significantly decreases, and body temperature drops, accommodating prolonged periods without food. This adaptive behavior helps them endure scarcity in food supplies while avoiding the extreme conditions of winter.