Bats colonies enter a torpor hibernation state in humid caves or hollow trees.
In the winter, trees go into a dormant state preserving energy and slowing internal processes.
Bears go into a light form of hibernation called a torpor for anywhere from 2 to 7 months.
Some frogs experience brumation during the winter, burrowing in riverbeds or bottoms of ponds.
Groundhogs go into true hibernation for the winter months in underground burrows.
While most ground squirrels hibernate, tree squirrels like us are active year round!