Wyoming Ground Squirrel (Urocitellus elegans) lives in mountain grasslands across Western North America. It feeds on grass and seeds. Its conservation status is Least Concern.
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Fascinating facts about the Wyoming Ground Squirrel
Since the early 1900s the Wyoming ground squirrel has pushed its range southward into Colorado. The expansion accelerated after the turn of the century because the landscape offered no natural barriers, abundant suitable vegetation and few competing rodents, and the squirrels readily occupied burrows made by other species. Human-driven changes such as livestock grazing and the poisoning of prairie dogs have also opened new ground, further aiding the spread.
The Wyoming ground squirrel can be distinguished from the similar Uinta ground squirrel by the pale buff colour on the underside of its tail, whereas the Uinta's tail underside is gray. In Montana, western Wyoming and extreme northeastern Utah the two species live together, and in this zone the Wyoming ground squirrel shows character displacement, with individuals becoming smaller and paler than their counterparts.
Males are the first to leave their burrows, surfacing in late March or early April, and females follow a week or two later, creating a clear sex-specific emergence pattern. Reproductive activity then begins in April, and adults start hibernating by late July while juveniles may remain above ground until September. This staggered timing allows juveniles to finish growth before the long winter dormancy.
In the warm months the Wyoming ground squirrel shows a clear shift in its daily routine to stay cool. During spring and early summer it is most active in the early afternoon, taking advantage of moderate temperatures. As summer progresses the pattern changes, producing two distinct activity peaks each day so the squirrel can rest during the hottest midday period. This bimodal schedule helps it avoid overheating while still foraging for food.
When it occupies a meadow, the Wyoming ground squirrel actively defends the area against other rodents. It displays antagonistic behaviour toward other ground squirrels and specifically drives the golden-mantled ground squirrel out of the space it uses.
Sources
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In the sun-drenched meadows of Wyoming, a diminutive yet irrepressible creature darts through the tall grasses, its tawny fur glistening like burnished copper in the warm light. The Wyoming ground squirrel, with its large, inquisitive eyes and twitching whiskers, moves with a fluid, almost weightless grace, as if barely touching the earth as it explores its subalpine realm. As it pauses to survey its surroundings, its tiny paws grasping a rocky outcropping or a blade of grass, the squirrel's very stillness seems to embody a deep and abiding connection to this windswept, high-country landscape.
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