Reading the animal in front of you
It’s the second-largest member of its genus, a stocky squirrel about 13 to 16 inches long including the tail, with short dense fur. The reliable field mark is color pattern: a tawny or rusty wash across the bridge of the nose and forelegs, a gray-flecked back, and a darker, black-fringed tail. It sits bolt upright at its burrow mouth so often that “standing at attention” is its most typical aboveground pose.
Several smaller ground squirrels share its range, and telling them apart takes practice. Belding’s ground squirrel is drabber and lacks the rich reddish tones. The Columbian’s size, the rusty nose, and its taste for meadow edges in mountain country usually separate it from the paler squirrels of lower, drier ground.
Eight months underground
Few mammals commit to hibernation the way this one does. Adults disappear into burrows by midsummer, males first, and young-of-the-year follow by early fall. The animal that emerges in spring is emaciated, having burned its fat down to almost nothing through the long sleep. Breeding happens within days of emergence, which is why the first squirrels above ground in April and May look thin and ragged.
Burrow systems get used for many years, some sheltering generation after generation. The squirrel favors mountain meadows, forest openings, and high plains where the soil digs easily, and its digging in turn aerates that soil. Seasonal reports reflect the compressed year: almost nothing before April, a rush of sightings through early summer, then silence again while marmots and tree squirrels are still going strong.
A social life of kisses and alarms
Colonies are loosely social. Encounters between neighbors often start with what looks like a kiss, mouth-to-mouth contact that lets one squirrel smell whether the other is friend or stranger. Alarm calls carry across the meadow when a weasel or hawk appears, and every squirrel within earshot dives for its own burrow.
The diet runs from grasses and forbs to bulbs, insects, and carrion. In farm country that appetite puts it in conflict with growers, and it has been treated as an agricultural pest for over a century, the same ambivalence that follows most colonial ground squirrels.
Holding its ground
The IUCN lists the species as Least Concern, and it remains abundant across broad swaths of the inland Northwest. Montana carries the heaviest concentration of records, with Idaho and Washington close behind and northeastern Oregon at the range’s edge. Those counts measure where observers and trappers work as much as where squirrels live, but the pattern matches the species’ known fondness for mountain meadow country. It came to science through the Lewis and Clark expedition, and two centuries later it’s still one of the most familiar mammals of the region’s high valleys.
