The litter size is usually three to eight young and sexual maturity is reached within the first year of life. This particular animal lived for eight years. They remain in their burrows during colder days from mid-November to late March. They can become active as early as March 29 and remain active as late as December 4. However, the major activity season is April to October.
Males become active earlier than females.
An interesting behavior exhibited by red-tailed chipmunks is sandbathing. They roll from side to side in the sand and even become half-buried. Most foraging is done on the forest floor during the spring. They may forage a distance of 45 to 60 mm within three to four minutes. Foraging in shrubs increases in the summer.