Mole vs vole damage comes down to one question: is the soil being pushed up, or are plants being eaten? Moles push soil into cone-shaped hills and raised ridges, and they mostly eat grubs and earthworms. Voles leave few or no mounds; they make narrow surface runways with open holes, and they chew roots, bulbs and bark. Alabama Extension calls moles carnivorous and voles herbivorous. The hardware follows: mole traps go in mole tunnels, and a mole trap will not stop a vole.
Why this decides what you buy
Getting the animal wrong is expensive in a very specific way. The two problems need different hardware, set in different places, and the gear for one does nothing about the other.
Washington's Department of Fish and Wildlife puts it plainly on its Living with Wildlife: Moles page (read September 28, 2026): moles, gophers and voles "can be found in the same location, and positive identification is needed, as control methods differ for each species."
A harpoon or scissor trap is built to fire when a mole pushes through its tunnel. A vole traveling a grass runway at the surface never touches it. A mouse snap trap set at a vole hole is useless against a mole working several inches down. And a stake or spray bought for "tunneling pests" usually has no independent evidence behind it for either animal.
The side-by-side check
| What you see | Mole | Vole |
|---|---|---|
| Mounds | Yes. Conical hills, usually under a foot across, with the hole plugged | Few or none |
| Raised ridges in the lawn | Yes. Surface tunnels 1 to 4 inches down | No raised ridges |
| Open holes | No. Molehill openings stay plugged | Yes. Burrow openings about 1-1/2 to 2 inches across |
| Paths through the grass | No | Yes. Worn runways at ground level, often under grass cover |
| Plants eaten | Seldom | Yes. Roots, bulbs, seedlings and bark |
| Gnawed bark at the base of trees and shrubs | No | Yes, in irregular patches at various angles |
| Main diet | Grubs, earthworms and other invertebrates | Grasses, roots and bark |
| The right hardware | Mole trap set in an active tunnel, where legal | Mouse-size snap traps at runways, wire guards, habitat changes |
The details in that table come from four places: WDFW and Nebraska Extension for the mole signs, and the University of California IPM program and Alabama Extension for the vole signs. Each is cited below where it matters.
Mole signs, in detail
The hill
Nebraska Extension's "Moles and Their Control" (G1538, revised 2010) describes mole mounds as "small, conical-shaped mounds (usually less than 1 foot in diameter)," made by pushing soil up out of vertical tunnels. WDFW gives a wider range, "roughly circular mounds that are 6 to 24 inches in diameter and 2 to 8 inches high," and adds the detail that settles most arguments: the opening near the center is "always left plugged."
If you can see an open hole in the middle of the soil pile, that is not a molehill.
The ridge
WDFW says surface tunnels sit "1 to 4 inches below the surface" and show as raised ridges or rips in the lawn, while deeper runways run 3 to 12 inches down. Press a surface ridge with your foot and it gives. That raised, spongy line is the single most reliable mole sign, because voles do not make it.
The plants
Moles are after invertebrates. Nebraska Extension says they "seldom eat roots, bulbs, or other plant materials." WDFW's diet list is mostly insects and worms but does include some grass roots, crop roots, bulbs and seeds. What moles do to plants is mostly indirect: soil heaves around roots, and grass over a fresh ridge can brown.
Not a gopher?
In parts of the country a pocket gopher is the third suspect. Nebraska Extension separates them by the mound: gophers make "relatively large, fan-shaped mounds (greater than 1 foot in diameter)" from inclined tunnels, where a mole's mound is conical and comes up from a vertical tunnel.
Vole signs, in detail
The runway
The University of California Statewide IPM Program's Pest Notes: Voles (Meadow Mice) (R.A. Baldwin, updated April 2023, read September 28, 2026) describes "well-traveled, aboveground runways that connect burrow openings," usually hidden under "a protective layer of grass or other ground cover." Burrow openings are "about 1-1/2 to 2 inches in diameter."
Part the grass along a suspect line. A vole runway is a flattened path at soil level, not a raised ridge.
The gnaw marks
UC IPM describes vole gnaw marks on trees as "about 1/8 inch wide and 3/8 inch long in irregular patches and various angles." Nebraska Extension adds two cautions. Girdling usually happens "in late fall and winter," so it is often discovered later. And girdling marks alone cannot prove voles, because rabbits cause similar damage. The irregular, multi-angle pattern is the tell for voles.
The plants
Alabama Extension's Controlling Damage from Moles and Voles (Bence Carter and Jim Armstrong, June 2021, read September 28, 2026) says voles are herbivorous and eat grasses and bark, causing plant death through root feeding and girdling. A perennial that wilts and lifts out of the ground with its roots gone points to voles, not moles.
The animal itself
If you do see one, the body tells you. Alabama Extension describes moles as 6 to 7 inches long with small eye and ear openings and large front feet with sharp claws. Voles are 4 to 6 inches long with short legs, short tails, and small eyes and ears; UC IPM gives 5 to 8 inches including the tail. A vole looks like a stocky mouse. A mole looks like a digging machine.
When it is both
This is common, and it is the case that sells the most wrong hardware. Nebraska Extension notes that voles use mole tunnels as travel corridors and can damage bulbs and plants along them. WDFW describes voles as rodents "which also occupy mole tunnels."
So a yard can show mole ridges and hills, plus dead plants with chewed roots along those ridges. The mole built the road; the vole is eating along it. Trapping the mole alone may leave the plant damage going. Treat them as two problems:
- The ridges and hills point to a mole and mole hardware, where legal.
- The chewed roots, open holes and gnawed bark point to voles and vole measures.
What each animal actually needs
For moles
Mole traps, whether harpoon, scissor-jaw, choker-loop or tunnel style, are set in active tunnels. Alabama Extension notes that harpoon traps tend to do better in sandy soils, while scissor-jaw and choker traps do better in loamy or higher-clay soils. These are lethal traps and legality varies by state: WDFW says traditional body-gripping mole traps are no longer legal in Washington. Check your state wildlife agency before buying.
If the damage is cosmetic, WDFW suggests shoveling off molehills and flattening ridges. A bow rake handles that far better than a leaf rake, as our leaf rake vs bow rake guide explains.
For voles
UC IPM recommends "standard mouse snap traps" set "at right angles to the runways with the trigger end in the runway," baited or unbaited, and covered with a piece of gutter to protect birds. A cover also puts a barrier between the trap and curious pets or children. Alabama Extension suggests peanut butter and oatmeal or apple slices as bait.
Habitat changes matter as much as traps. Alabama Extension advises clearing mulch back at least 3 feet from tree bases and keeping nearby lawn mowed short, and Nebraska Extension recommends removing dense vegetation that gives voles shelter. Heavy leaf mats beside beds are exactly that kind of cover going into winter, so a practical leaf cleanup equipment plan earns its keep here too.
For individual trees and shrubs, UC IPM describes wire guards or aluminum flashing with a mesh size of 1/4 inch or smaller, standing at least 12 inches above the ground, with tree guards set 4 to 6 inches below the soil surface.
Rodenticides are a different category of risk. Nebraska Extension treats them as a last resort for severe infestations and says to use them cautiously away from pets and children. Any product must be used exactly as its label directs, which in the U.S. is the law.
For neither
UC IPM says "electromagnetic or ultrasonic devices" are "ineffective against voles," and the Internet Center for Wildlife Damage Management says no frightening device has been proven effective against moles. Buying one to cover both animals covers neither.
A two-day identification routine
- Walk the damage in daylight and note hills, ridges, open holes, runways and dead plants separately.
- Look at each soil pile for an opening. Plugged points to a mole; an open hole of about 1-1/2 to 2 inches points to a vole.
- Step down a few ridges and mark them. Nebraska Extension says a ridge pushed back up within about 24 hours is an active mole tunnel.
- Pull one dead plant. Roots gone or gnawed points to voles.
- Check tree and shrub bases for irregular gnawing at ground level, remembering rabbits can do similar damage.
Only then decide on hardware.
FAQ
How can I tell mole vs vole damage quickly? Look for raised soil. Moles leave conical hills with plugged openings and raised ridges. Voles leave narrow surface runways, open holes about 1-1/2 to 2 inches across, and chewed plants, with few or no mounds.
Do moles eat plants and bulbs? Seldom. Nebraska Extension says moles seldom eat roots, bulbs or other plant material. Missing roots and chewed bulbs usually point to voles.
Will a mole trap catch voles? Generally no. Mole traps are set in mole tunnels below ground, while voles travel surface runways. UC IPM recommends mouse-size snap traps at right angles to vole runways.
Can moles and voles be in the same yard? Yes. Voles use mole tunnels as travel routes, so you can see mole ridges and vole plant damage together. Treat them as two separate problems.
When does vole damage happen? Nebraska Extension says vole girdling usually happens in late fall and winter, which is why checking tree bases before and after winter is worth the few minutes.