Half the people who think they have a mole problem actually have voles. The other half think they have voles and it’s moles. The two animals don’t look alike, don’t eat the same things, and don’t respond to the same control methods. If you treat a vole like a mole, you’ll spend money and get nowhere. Here’s how to tell which one is destroying your yard.
Quick identification
If your plants, bulbs, or tree bark are chewed, you have voles. If your lawn has raised ridges and dirt mounds but your plants are untouched, you have moles. Castor oil repellent works on moles. For voles, you need a different approach entirely.
What moles look like and what they do
Moles are built for digging. They’re about 6–8 inches long, have velvety dark fur, tiny eyes they barely use, and enormous paddle-shaped front feet with claws. You almost never see one above ground.
What you do see are their tunnels. Moles dig two kinds:
Surface runways: Raised ridges of soil that snake across your lawn. These are temporary feeding tunnels.
Deep tunnels: Permanent highways 6–12 inches down, marked by volcano-shaped dirt mounds where they push excess soil to the surface.
Moles are insectivores. They eat grubs, earthworms, beetles, and larvae. They do not eat plants, bulbs, or roots. If your tulips are gone or your tree bark is stripped, a mole didn’t do it.
What voles look like and what they do
Voles look like stocky mice with short tails. They’re 4–6 inches long, have visible ears and eyes, and brown or gray fur. Unlike moles, you’ll sometimes see them above ground, especially at dawn or dusk.
Voles are herbivores. They eat grass, roots, bulbs, seeds, and bark. In winter, they’ll gnaw tree trunks and shrubs at ground level, which can kill young trees.
Their tunnels are different too. Voles use shallow surface runways through grass — about 1–2 inches wide — but they don’t push up big dirt mounds. The grass just looks parted or flattened. You might see small holes about the size of a golf ball where they enter and exit.
The damage tells you everything
| Sign | Mole | Vole |
|---|---|---|
| Raised soil ridges | Yes — long, winding tunnels | No — shallow grass runways instead |
| Dirt mounds | Yes — volcano-shaped piles | Rarely — small holes at most |
| Chewed plants or bulbs | No — moles don’t eat plants | Yes — this is the main sign |
| Girdled tree bark | No | Yes — especially in winter |
| Animal seen above ground | Almost never | Sometimes — looks like a mouse |
If you’re still not sure, flatten a section of tunnel and wait. Moles repair their tunnels within a day or two. Voles use runways repeatedly but don’t always maintain them the same way.
Why the confusion matters
Mole control and vole control are completely different.
For moles: You can use castor oil repellents, which make the soil unpleasant enough that they leave. You can also trap them, though some states restrict or ban certain traps. Poisons exist but are risky around pets.
For voles: Castor oil does nothing — they don’t care. You need to remove ground cover (voles love hiding in mulch and dense grass), use hardware cloth around tree trunks, or set mouse-style snap traps along their runways. Poison baits work but carry the same pet and wildlife risks as any rodenticide.
Buying mole traps for a vole problem is like bringing a fishing rod to a gun range. Wrong tool, wrong animal, wasted money.
Can you have both?
Yes, unfortunately. A yard with healthy grub populations can attract moles, and the same yard with thick ground cover and plenty of plants can support voles. The tunnels can even overlap in places, which makes identification harder.
If you’ve got raised ridges and chewed plants, you probably have both. Deal with the moles using repellents or traps, and deal with the voles by clearing habitat and setting snap traps.
Seasonal patterns
Moles: Most active in spring and fall when soil moisture brings worms and grubs near the surface. Summer heat and winter frost push them deeper, so surface damage slows down.
Voles: Active year-round. Winter damage is actually worse because food is scarce and they’re gnawing bark off trees and shrubs. Spring reveals the extent of the destruction when snow melts.
How to control each one
Mole control
Start with a castor oil repellent applied across the entire affected lawn. Water it in and reapply every 4–6 weeks. If that doesn’t work and trapping is legal where you live, set scissor-style or live cage traps in active surface tunnels. Check daily.
Vole control
Clear mulch and dense vegetation from around tree bases and shrubs — voles need cover to avoid predators. Wrap tree trunks with hardware cloth or plastic guards to prevent girdling. Set snap traps perpendicular to runways, baited with peanut butter or apple slices. Check and reset daily.
Bottom line
Before you spend a dollar on control, figure out which animal you’re fighting. Moles = raised tunnels and dirt mounds, no plant damage. Voles = chewed plants, girdled trees, shallow grass runways. The control methods don’t overlap much, so getting it wrong means buying the wrong product and watching your yard get worse while you wait.
If it’s moles, start with a castor oil repellent. If it’s voles, clear the ground cover and set traps. And if you’re not sure, set up a cheap wildlife camera near the damage for a night or two — you’ll know within 48 hours.