Both are small only reaching 8-10 inches at maturity. Either can hibernate, but western chipmunks seem more likely to stay active all year. Both species breed in the spring and summer months. Gestation usually takes one month and litters may have 2-8 young. The eastern species seems to be more likely to have more than one litter a year, although either species may have several if the conditions are right.
Chipmunks are ground dwellers .
They are active during the day and move around cautiously and tentatively. Chipmunks exist in all 48 of the main states of America and seem to be thriving more now than ever. As with other animals, chipmunks have been able to take advantage of suburban areas. They can exist alongside man in parks, wooded lots or in our yards. Chipmunks have a large list of food on which they will readily feed.