Round-tailed Ground Squirrel
Mammals diurnal

Round-tailed Ground Squirrel

Xerospermophilus tereticaudus

Meet the 'desert sentinel,' a charmingly slender squirrel that blends perfectly with the Southwest's sandy floor. Watch them periscope from their burrows and navigate the desert heat with surprising grace.

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Quick Identification

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Size

Length: 20-28 cm (8-11 inches); Weight: 110-170 g (4-6 oz)

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Colors

Uniform sandy-buff, pale cinnamon, or grayish-tan coat; creamy white underbelly; no stripes or spots; tail often tipped with darker hairs.

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Key Features

  • Long, slender, cylindrical tail without bushy fur
  • Uniform sandy-buff coat providing perfect desert camouflage
  • Small, rounded ears that lie nearly flat against the head
  • Large, dark eyes set high for a wide field of view

When You’ll See Them

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Activity pattern diurnal
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Peak hours 7-10 AM and 4-7 PM
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Season March-August
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Diet Primarily herbivorous, consuming green desert shoots, seeds, and cactus fruit; they occasionally eat insects for supplemental protein and moisture.
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Habitat Arid desert basins with loose, sandy soil for burrowing, often associated with creosote, saltbush, and mesquite flats.

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Behavior

These social rodents are true masters of the desert heat, often seen standing upright on their hind legs like tiny sentinels to survey their surroundings. They live in complex burrow systems usually located beneath the protective canopy of mesquite trees or creosote bushes, which provide both shade and structural integrity for their tunnels. Unlike many desert mammals that are strictly nocturnal, these squirrels are active during the day, though they wisely retreat underground during the scorching midday hours to avoid overheating.

Socially, they live in loose colonies where they communicate using high-pitched, bird-like alarm whistles to warn neighbors of approaching predators like hawks, snakes, or coyotes. While they can be wary of humans, they often adapt well to suburban desert landscapes, particularly if there is a consistent water source. They spend a significant portion of the year in a state of dormancy—hibernating during the coldest winter months and often 'estivating' (a summer version of hibernation) during the hottest, driest weeks of July and August to conserve energy and moisture.

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Camera Tips

To capture the best footage of Round-tailed Ground Squirrels, position your camera low to the ground—no more than 6 to 10 inches high. These squirrels are relatively small and stay close to the earth, so a high angle will miss the fine details of their expressive faces. Aim your lens toward the base of mesquite trees or near visible burrow entrances in sandy patches. Since they are most active in the early morning and late afternoon when the sun is low, try to position the camera facing north or south to avoid direct lens flare during these peak activity windows.

While we don't recommend heavy baiting, placing a shallow saucer of water in a dry desert yard is the ultimate 'camera trap' for these thirsty rodents. They are highly attracted to the sound and sight of water in the arid Southwest. If you want to encourage them to pause in front of the lens, a small scattering of native birdseed or unsalted sunflower seeds near a natural prop, like a sun-bleached log or a flat rock, will keep them busy long enough for a high-quality recording. Ensure your camera's trigger speed is set to the fastest possible setting, as their movements can be incredibly quick and erratic when they sense danger.

Seasonal timing is crucial for this species. They disappear underground for long stretches during the winter and the hottest, driest weeks of mid-summer. For the best results, set your cameras out in late February through May. This is their primary breeding season when they are most active, social, and prone to 'periscoping'—standing tall on their hind legs to scan for mates and rivals, which makes for fantastic video content. Use a 'burst' photo mode or short 15-second video clips to capture these dynamic behaviors without filling up your SD card too quickly.

Frequently Asked Questions

They are strictly diurnal, meaning they are active during daylight. You’ll see them most often in the early morning and late afternoon, as they typically retreat to their cool underground burrows to nap during the intense midday desert heat.
The most effective way to attract them is by providing a reliable, shallow water source and maintaining natural desert landscaping. Planting mesquite or creosote provides the cover they crave, while a bit of scattered birdseed can encourage them to visit specific spots for your camera.
Their diet is highly seasonal. In the spring, they feast on green shoots and flowers. As the desert dries out, they shift to seeds, cactus fruits, and the occasional insect. They get much of their hydration from the plants they eat, but will eagerly drink from backyard birdbaths.
Yes, they are quite common in suburban neighborhoods within the Sonoran and Mojave deserts, provided the soil is loose enough for digging. They are frequently found in 'xeriscaped' yards that mimic their natural desert habitat.
Round-tailed Ground Squirrels are much smaller and have a thin, mouse-like tail without any fluff. Rock Squirrels are significantly larger, have bushy tails, and usually feature mottled gray-and-black fur with a more rugged appearance.

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