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  1. When and How Do Brown Bears Hibernate? - World Deer

  2. Drivers of hibernation in the brown bear - Frontiers in Zoology

  3. Bear Hibernation: The Science Behind Their Long Winter Sleep

  4. Unveiling the Fascinating Alaskan Brown Bear Life Cycle

  5. 5 Stages of Activity and Hibernation - North American Bear Center

  6. Brown Bears - Bears (U.S. National Park Service)

  7. the brown bear: torpor or hibernation? - Four Paws

  8. Drivers of hibernation in the brown bear - ResearchGate

  9. Denning in brown bears - PMC - National Center for …

  10. Bear Hibernation: Facts and Myths from the Den | Outdoor Life