With more than 1500 species of rodents cataloged, rodents comprise more than two-thirds of all the mammals on earth. Many of them, such as groundhogs, are true hibernators while others, such as chipmunks, spend time in a semi-dormant state and revive occasionally to feed. The vast majority of rodents, though, do not hibernate.
Mice, rats and tree squirrels are three common pests that do not hibernate. These rodents nest and gnaw and will dig their way into almost any soft material, like insulation or upholstery, which will supply a warm comfortable environment for their young. This can be destructive to your house and belongings.