Population, Conservation Status, Threats:
Considered least concern, with stable populations, by the IUCN. Their primary threat is habitat loss due to human activity, including introduction of domestic dogs and cats which may hunt and kill least chipmunks. Overall, their populations are steady.
Physical Description:
The smallest species of chipmunks, least chipmunks are easily identifiable by the five black stripes along their back, extending over their face and eyes. They are overall tan to brown-red, with a long, moderately bushy tail.
Overall least chipmunk range from Montana Field Guide. Present in the mountainous portion of Colorado and other western states, and large portions of Canada.
Habitat:
Montane regions in Colorado, and throughout the Rocky Mountains in general.
Behavior:
Least chipmunks are diurnal and generally solitary outside of the mating season. They are well-adapted for climbing, a skill often utilized when foraging for nuts and seeds - their primary food source - and when escaping from predators.
Diet:
Primarily eats plant matter, but may opportunistically eat invertebrates. Nuts, seeds, fruits, and tender plants make up the bulk of their diet. Will use cheek pouches to hold food. Spends the summer months scatter-hoarding in preparation for winter, later emerging periodically from hibernation to recover and eat stored food.
Reproduction:
Females reach sexual maturity at 10 months of age. Pregnancy lasts for about a month, producing 2-6 young in spring. Newborn chipmunks require significant parental care, arriving bald and blind. Young leave the mother after about two months.
Associated Species:
Small predators like American Martens and Cooper's hawks will often predate upon least chipmunks. Domestic dogs and cats also pose a threat whenever they encroach upon least chipmunk habitat.
Illustration by Willow Sedam