"Denning and Hibernation Behavior" according to the National Park Service National Park Service: Denning and Hibernation Behavior according to the National Park Service fecal plugs according to the National Park Service super hibernators according to the National Park Service "Denning and Hibernation Behavior" «супер-анабиозниками» source Denning and Hibernation Behavior according to the National Park Service National Park Service: Denning and Hibernation Behavior according to the National Park Service source «супер-анабиозниками» according to the National Park Service according to the National Park Service https://www.nps.gov/yell/learn/nature/denning.htm according to the National Park Service "Denning and Hibernation Behavior" source according to the National Park Service National Park Service: Denning and Hibernation Behavior nps.gov/yell/learn/nature/denning.htm National Park Service: Denning and Hibernation Behavior according to the National Park Service Yellowstone National Park website according to the National Park Service literally turn their pee into protein according to the National Park Service on the fence according to the National Park Service Denning and Hibernation Behavior "Denning and Hibernation Behavior" source National Park Service: Denning and Hibernation Behavior