Arctic ground squirrel
Quick Summary
The Arctic ground squirrel (Spermophilus parryii) is a large rodent found in Alaska, northwestern Canada, and Siberia. It is grayish-tan with a reddish face and chest and lives in large colonies. These squirrels are known for their extended hibernation periods, sometimes spending over half the year dormant.12
Arctic ground squirrels have adaptations for their short active season, which is less than six months. During this time, they must breed, raise young, maintain their burrows, and prepare for hibernation. Their reproductive cycle is timed so that mating occurs in mid-May, with young born about 25 days later. By mid-July, the young are foraging, and by October, both adults and young reach a significant weight.2
Like many ground squirrels, Arctic ground squirrels are omnivorous, consuming seeds and other plant matter. Their hibernation involves a drastic drop in body temperature, heart rate, and respiration.34
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
