Mammals Active day and night

Montane Vole

Microtus montanus

iNaturalist Wikipedia

The Montane Vole is the tiny, tireless tunnel-maker of the West, thriving in rugged mountain meadows and surviving harsh winters under the snow.

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Quick Identification

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Size

Total length: 140-195 mm (5.5-7.7 in); Weight: 30-85 g (1.1-3 oz)

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Colors

Upperparts are grizzled brownish-gray to sepia; underparts are silvery-white to light gray; tail is distinctly bicolored.

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Key Features

Stocky body with a tail less than one-third its total length
Small ears that are almost entirely hidden by thick fur
Grizzled 'salt and pepper' fur texture
Bicolored tail, darker on top and lighter on bottom

When You’ll See Them

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Activity pattern Active day and night

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Peak hours 6-9 AM, 5-8 PM

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Season Year-round

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Diet Primarily herbivorous, focusing on green grasses, sedges, succulent forbs, and occasionally roots or bark during winter.

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Habitat Alpine and subalpine meadows, grassy riparian zones, mountain valleys, and moist suburban garden edges.

public Geographic range

Where Does the Montane Vole Live?

Native to the mountainous regions of western North America, the Montane Vole is a quintessential high-country resident. Its core range spans the western United States and southwestern Canada, stretching from the interior of British Columbia southward through the Rocky Mountains, the Great Basin, and into the Sierra Nevada and Cascade ranges. These hardy rodents are found in states ranging from Washington and Montana down to New Mexico and California, wherever moist, grassy habitat exists at mid-to-high elevations.

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2 Countries

1.2M km² Range

Least Concern Conservation

US United States CA Canada

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iNaturalist / Verified observation data

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Behavior

Montane Voles are the industrious architects of the western high country. They are best known for creating 'runways'—deliberate, narrow paths clipped through dense grass that connect their burrow entrances to feeding sites. These paths act as high-speed highways, allowing them to zip between cover while remaining hidden from the keen eyes of hawks and owls. Unlike many mountain residents, they do not hibernate; instead, they spend their winters in the 'subnivium'—the narrow gap between the ground and the bottom of the snowpack—where they remain active and protected from the freezing wind.

These rodents are semi-fossorial, meaning they spend a significant amount of time underground in shallow burrow systems. Their populations are famously cyclical, often exploding in numbers every three to four years, which provides a massive food source for local predators. While they are generally solitary and can be territorial during the breeding season, their high reproductive rate ensures they are one of the most numerous mammals in their range.

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Camera Tips

To successfully capture a Montane Vole on camera, you must first locate their 'runway' networks. These are 1-2 inch wide paths in tall grass where the vegetation has been flattened or chewed away to the soil. Place your camera only 3-5 inches off the ground, pointing directly along one of these paths. Because voles are small and fast, use a camera with a high trigger speed (0.2s or faster) and set it to take 3-photo bursts to ensure you catch more than just a blurry tail.

In a backyard setting, focus on the edges of garden beds or near woodpiles and rock walls. These transition zones provide the cover voles crave. To encourage them to linger for the AI to identify them, place a small amount of 'bait' like birdseed or a smear of peanut butter on a flat rock in the center of the frame. This will force them to pause their frantic scurrying for a clear shot.

Seasonality plays a big role in vole spotting. During the spring melt, look for 'snow tunnels'—tubes of mud and dead grass left behind on the surface as the snow disappears. Placing a camera near these exposed tunnels can yield high traffic. At night, ensure your camera's infrared LEDs are clean; the reflective quality of their fur can sometimes cause 'white-out' on close-range night shots, so try to angle the camera at a 45-degree angle to the path rather than head-on.

Similar Species

Species that look similar or are commonly confused with Montane Vole.

Long-tailed Vole

Distinguished by a tail that is noticeably longer (nearly half the length of its body) and a preference for more forested habitats.

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Frequently Asked Questions

Montane Voles are active at all hours, but they show a marked preference for the crepuscular hours of dawn and dusk. They often venture out during the day when there is thick cloud cover or dense grass to provide protection from predators.

The best way to attract Montane Voles is to leave patches of tall, native grass or create 'wild' corners in your garden. Providing cover like brush piles or low-lying shrubs will make them feel safe enough to establish a runway system.

They are strict vegetarians for the most part, eating the green stems and leaves of grasses and sedges. In your garden, they may also nibble on the roots of perennials or the bark of young fruit trees during the winter months.

Yes, they are very common in suburban neighborhoods that border foothills, canyons, or mountain parks. They are often the 'mystery' animals responsible for small holes in the lawn or chewed irrigation lines.

Montane Voles typically have a shorter tail relative to their body size compared to Meadow Voles. Additionally, Montane Voles are more likely to be found in drier, higher-elevation habitats, whereas Meadow Voles prefer lower, wetter marshes.

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