Mammals crepuscular

Gray-tailed Vole

Microtus canicaudus

The Gray-tailed Vole is a hidden gem of the Pacific Northwest, found nowhere else on Earth but the Willamette Valley and its immediate surroundings. These master tunnelers play a vital role in the ecosystem, turning the soil and providing a primary food source for local birds of prey.

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Quick Identification

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Size

Total length 140–190 mm (5.5–7.5 in); weight 30–60 g (1.1–2.1 oz)

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Colors

Brownish-gray to yellowish-gray upper body; silvery-gray underbelly; tail is bicolored with a dark gray top and lighter bottom

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Key Features

Tail is significantly shorter than the body length
Small ears tucked almost entirely into thick fur
Stocky, rounded body shape
Distinctive grayish hue to the tail compared to other voles

When You’ll See Them

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Activity pattern crepuscular

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Peak hours 4-7 AM, 5-9 PM

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Season Year-round, with peak activity in Spring and early Summer

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Diet Primarily herbivorous; feeds on green grasses, clover, seeds, and various agricultural crops like alfalfa and grain.

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Habitat Native prairies, pastures, grassy fields, and agricultural lands within the Willamette Valley and surrounding regions.

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Behavior

Gray-tailed Voles are industrious little architects of the grasslands. They spend much of their lives creating intricate networks of tunnels and surface runways through thick vegetation. These pathways allow them to move between feeding areas and burrow entrances while staying hidden from the sharp eyes of hawks and owls. Interestingly, they are known to be quite social compared to other vole species, often sharing burrow systems with other individuals or even different small mammal species.

While they are elusive and rarely seen by humans, their presence is often given away by these 'vole highways'—narrow, 1-2 inch wide paths of flattened or cleared grass. Their populations are famous for their boom-and-bust cycles; one year a meadow might be teeming with hundreds of voles, and the next, they may seem to have vanished entirely. They are generally shy and will bolt for cover at the slightest vibration or shadow.

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Camera Tips

To capture high-quality footage of a Gray-tailed Vole, you must think at ground level. Look for 'runways' in tall grass—these look like tiny, well-manicured trails. Mount your camera no more than 3 to 5 inches off the ground. If your camera has a 'Macro' or close-focus setting, enable it, as these animals are small and will likely pass very close to the lens. Aiming the camera along the length of a runway rather than perpendicular to it will give the sensor more time to trigger before the vole scurries out of frame.

Because these voles are incredibly fast, set your camera to 'Burst Mode' or high-frame-rate video. A slow trigger speed will often result in a 'ghost' or just a blurry tail. If you are using video, keep the clips short (10-15 seconds) to preserve battery life while ensuring you catch the action. Infrared (no-glow) flash is highly recommended to avoid startling them during their peak twilight hours, which could cause them to abandon that specific path.

While they are naturally wary of traps, they can be lured in front of a lens with a small 'bait station.' A smear of peanut butter mixed with rolled oats on a flat stone or log near a burrow entrance is often irresistible. Position your camera about 2-3 feet away from this bait to ensure the entire animal is in focus. In the Willamette Valley, the wet winter months can make ground-level photography difficult; try placing your camera on a small wooden platform or brick to keep it out of the mud while maintaining that crucial low-angle perspective.

Similar Species

Species that look similar or are commonly confused with Gray-tailed Vole.

Townsend's Vole

Much larger than the Gray-tailed Vole with a longer tail and darker, brownish fur.

Montane Vole

Similar in size but found in higher elevations; its tail is usually longer and less gray.

Meadow Vole

Has a longer tail and a more widespread distribution across North America compared to the PNW-specific Gray-tailed Vole.

Frequently Asked Questions

Gray-tailed Voles are primarily crepuscular, meaning they are most active during the low-light hours of dawn and dusk. However, during the height of summer or in very safe, cover-rich environments, they may occasionally venture out during the day or night.

The best way to attract them is to provide 'wild' spaces. Leave a patch of grass unmowed to create thick cover and plant native bunchgrasses or clover. Avoid using rodenticides, as these can harm the voles and the owls that eat them. A small pile of brush or logs can also provide the security they need to establish a burrow.

They are almost entirely vegetarian, focusing on the succulent stems and leaves of grasses and forbs. They are also known to eat seeds and can sometimes be found foraging for fallen birdseed under backyard feeders.

Yes, provided there is enough open green space. They are frequently found in suburban backyards that border parks, fields, or agricultural land in Oregon and Washington. If you have 'tunnels' appearing in your lawn under the grass, you likely have voles.

The Gray-tailed Vole is generally smaller and has a noticeably shorter tail that is distinctly gray. Townsend's Voles are larger, darker, and have tails that are much longer (usually over 50mm).

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