Rare, red, and local
Adults are small for their genus, about 8 to 10 inches including the tail, with a warm reddish-brown cast over the back and a whitish eye ring. Until recently this animal and the southern Idaho ground squirrel were treated as one species, the Idaho ground squirrel, before being split into northern and southern species. The northern animals, the ones carrying the Idaho ground squirrel name today, live north of the Payette River.
Within its range there is little to confuse it with, because so few ground squirrels share its dry meadows. That smallness of range is the whole story: a couple of counties hold every wild colony on earth.
Meadows among the pines
The squirrel lives in open meadows and grass-dotted slopes within ponderosa pine and Douglas-fir country, at moderate elevations in Idaho’s west-central mountains. It needs deep meadow soil for burrows and a good crop of grass and forb seeds to fatten on. Its active season is brief. It emerges in spring, breeds, and retreats underground by high summer to escape the heat, then hibernates through winter in one long dormancy.
That calendar shows in the records: a spring and early-summer pulse of reports, then quiet. Colonies are small and scattered, and some sit close enough to roads that passing travelers in May and June can see the squirrels standing at their burrows.
How it got so rare
The decline traces to the meadows themselves. Fire suppression let conifers creep into the open ground the squirrels need, shading out grasses and collapsing burrow habitat, while grazing, roads, and shooting took a toll on top. By the time the species was recognized as distinct, its colonies were already fragments.
Recovery work has been direct: thinning encroaching trees, prescribed fire to reopen meadows, and protecting occupied sites. The IUCN lists the species as Endangered, and Idaho tracks the colonies closely. For a small mammal, it has an unusually detailed paper trail, because when a species is this localized, biologists can realistically watch most of it.
The record set is correspondingly tight. Reports cluster in a handful of meadow systems in Adams and Valley counties, and there is no wider range for the records to hide in. What looks like sparse coverage is actually close to a complete portrait of a species hanging on in its last meadows.
