Voles in the yard: how to recognize them, repair lawn runways and protect trees and bulbs

Vole, mole, mouse or shrew: how to tell

Many people call any small animal digging in the yard (the garden, in British English) a mole. The difference matters, because the fix is completely different.

If you see mice inside the house, follow our guide to mice instead. Larger holes with a big mound of soil by a deck or shed are usually groundhogs.

Signs of voles: runways, holes and droppings

• Runways: trails 1 to 2 inches wide where the grass has been clipped very short, connecting small holes. Fresh cuttings and droppings mean the runway is still in use.
• Burrow openings about 1.5 to 2 inches across, without a mound of soil.
• Droppings about 3/16 inch long, greenish when fresh and brown or gray when old, found in the runways.
• Snow full of holes: as the snow melts, it can look like Swiss cheese, with holes lined up along the runways.
• Small cone-shaped soil piles and sickly trees with eaten roots: signs of woodland (pine) voles underground.
• Gnaw marks on bark about 1/8 inch wide and 3/8 inch long, in irregular patches, from a few inches above the soil to a few inches below. Rabbit damage is larger and cleaner.

Vole damage in the lawn after snow

Meadow voles stay active all winter, moving and feeding under the snow, which hides them from predators. When the snow melts in early spring, their runways appear as a network of brown trails. Penn State Extension describes this lawn damage as usually temporary, and Nebraska Extension notes that it generally repairs itself during spring growth without treatment or overseeding, because voles clip the blades but rarely eat into the crowns of the grass.

What helps:

1. 01

   Wait for growth

   Give the lawn a few weeks of active spring growth before deciding anything.

2. 02

   Rake lightly

   Clear loose clippings and debris from the runways so new blades get light.

3. 03

   Patch only bare spots

   Reseed or patch only where the soil is exposed and nothing regrows.

4. 04

   Mow short in fall

   Utah State Extension advises mowing very short at the last mowing of the season, which leaves voles less cover under the snow.

Girdled trees, shrubs and bulbs

The bigger risk is to woody plants. Voles gnaw bark mostly in fall and winter, and the damage often goes unnoticed until the snow melts. Under deep snow, gnawing can reach a foot or more up the trunk. Utah State Extension notes that young trees girdled more than halfway around the trunk have a low chance of survival, so check every young tree in early spring and replace those that are badly girdled.

Woodland (pine) voles work underground, eating small roots and girdling larger ones. Trees and shrubs then decline slowly and look sickly without any visible bark damage above ground.

Protecting bulbs

Voles readily eat tulip bulbs and the bases of perennials. NC State Extension suggests lining the bottom and sides of the planting hole with hardware cloth of 1/4 inch or smaller and covering the bulbs with soil. Keep mulch thin in bulb beds, or use gravel mulch, since thick organic mulch gives voles cover. Some gardeners edge beds with daffodils, alliums or fritillaries, which voles find less appealing, though there is little trial data on how well this works.

Make the yard less inviting

Voles need dense cover. Remove it and fewer voles settle, and those that stay are easier to trap.

• Mow regularly: Penn State Extension suggests keeping ground cover at 3 to 6 inches.
• Pull mulch back at least 2 feet from tree trunks.
• Keep a clear zone around young trees: Penn State suggests at least 2 feet free of vegetation, or 3 to 4 inches of crushed stone; Utah State suggests a 3-foot circle of bare soil; UC IPM a circle about 4 feet across.
• Create a buffer: where possible, a 6 to 8 foot strip of bare or short ground between the yard and long grass or fields.
• Clear debris: brush, leaf piles and weedy fence lines all shelter voles.

Tree guards and hardware cloth

A wire cylinder around each young tree is the most reliable protection.

1. 01

   Choose the mesh

   Use 1/4-inch hardware cloth or smaller. Sheet metal or heavy plastic cylinders also work.

2. 02

   Make it tall enough

   18 to 24 inches high, and taller than your usual snow line where winters are snowy.

3. 03

   Bury the base

   Sink the bottom 4 to 6 inches into the soil so voles cannot tunnel underneath. Utah State gives 3 inches as a minimum.

4. 04

   Leave room to grow

   Make the cylinder wide enough for about five years of trunk growth and check it each spring.

5. 05

   Fit before winter

   Put guards on in fall, before the first heavy snow.

For a vegetable or flower bed, a fence of 1/4-inch mesh or aluminum flashing at least 12 inches high, with the bottom buried 6 to 10 inches, keeps voles out; a weed-free strip outside it improves the result.

How to trap voles

Trapping works well in a home yard when numbers are modest.

1. 01

   Use mouse traps

   Standard mouse-sized snap traps are the right size.

2. 02

   Find active runways

   Look for fresh clippings and droppings, or active holes.

3. 03

   Set traps across the runway

   Place each trap at a right angle to the runway with the trigger end in the path.

4. 04

   Bait if you like

   Bait is optional; a peanut butter and oatmeal mix or apple slices work well.

5. 05

   Cover the traps

   Put a box, board or piece of roofing over each trap to protect birds and pets.

6. 06

   Use enough traps

   UC IPM suggests at least a dozen for a small garden.

7. 07

   Check daily

   Morning and evening if you can. When catches stop, move the traps 15 to 20 feet and start again.

8. 08

   Pick your season

   Penn State notes that fall and late winter are the easiest times to trap.

Wear gloves to handle traps and dead voles, and wash your hands afterward. If you use live traps, check your state's wildlife rules on release before you start.

Repellents, gadgets and poison baits

• Repellents: products with thiram, capsaicin or castor oil have little evidence of working against voles, and must go on before damage starts, which is hard when voles feed at or under the soil surface. Use them only alongside guards and habitat changes, and only on food crops if the label allows it.
• Ultrasonic and electromagnetic devices: UC IPM considers them ineffective against voles.
• Frightening devices and fumigants: Penn State says these are generally not effective.
• Predators: NC State Extension suggests encouraging owls and hawks, for example with nest boxes, though there is no measured evidence of how much this helps.

Why some years are worse

Vole numbers rise and fall in cycles, peaking roughly every 2 to 6 years depending on the species and the region, and can reach several thousand per acre at a peak. Females can breed at 35 to 40 days old and have several litters a year, usually 3 to 6 young each. That is why one winter can bring sudden heavy damage and the next very little. Most voles live less than a year.

When to call a professional

• Many young trees, an orchard or a nursery are at risk.
• Trapping and habitat changes have not reduced the runways after several weeks.
• You think bait is needed.
• You are not sure whether you have voles, moles or pocket gophers.

Your county extension office can often confirm the animal from photos of the runways and gnaw marks.

Sources

University extension guidance, checked on 27 October 2026.

• Penn State Extension · Voles ↗Species, size, identification against moles, mice and shrews, runways, gnaw marks, breeding, mowing height, mulch, tree guards, trapping, repellents and baits.
• University of California IPM · Voles ↗Burrow size, droppings, population peaks, damage under snow, clear zones, fencing, trap placement, ultrasonic devices and zinc phosphide safety.
• Utah State University Extension · Five tips to prevent vole damage ↗Timing of girdling, survival of girdled trees, runway width, guard burial, bare-soil zones and fall mowing.
• Nebraska Extension in Lancaster County · Lawn tips for late winter ↗Runways after snowmelt and lawn recovery without treatment or overseeding.
• NC State Extension · Organic vole control for fall and winter ↗Hardware cloth in planting holes, thin mulch and bulbs that voles find less appealing.