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In page American black bear:

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The body temperature does not drop significantly, like other mammalian hibernators (staying around 35 °C (95 °F)) and they remain somewhat alert and active. If the winter is mild enough, they may wake up and forage for food. Females also give birth in February and nurture their cubs until the snow melts.[15] During winter, American black bears consume 25–40% of their body weight.[16] The footpads peel off while they sleep, making room for new tissue.[citation needed]