A little tid bit on Dens

Dens

Raccoons make dens in hollow trees, rock crevices, or burrows dug by other animals, and in storm sewers, crawl spaces, chimneys and attics. Except during extreme weather or when a mother is denned with her young, Raccoons do not occupy a den for more than one or two days. Females who are disturbed will often move their young to new dens. Raccoons do not hibernate, but they do live off stored body fat when food is scarce during the winter. Re: pets.com