03/07/2026
Those tunnels in your lawn aren't what you think.
I'm an Eastern Mole. And I have never eaten a single blade of grass. I'm a carnivore. My entire diet is underground insects, grubs, and earthworms.
The thing actually eating your grass roots is the Japanese beetle grub ā a white C-shaped larva living in the top few inches of soil. That's what I'm hunting when I dig. A single mole eats tens of thousands of grubs per year.
The tunnels you see on the surface are hunting runs. I push through soft soil following grub trails the same way a dog follows a scent. The lawn lifts slightly above the tunnel. It looks messy. But underneath, the grub population is being controlled for free.
Those tunnels also aerate compacted soil and improve drainage. Grass roots grow better in soil that a mole has worked through than in soil that's been left compressed.
The brown patches that show up in late summer are usually grub damage, not mole damage. Removing the mole removes the control. The grubs stay.
šæ If you have mole tunnels:
- Press the raised turf back down with your foot ā the grass recovers in a few days
- The tunnels mean your soil has a healthy insect population, which means healthy soil biology overall
- If the tunneling is concentrated in one area, that's where the grub population is highest ā the mole is showing you where the real problem lives
- A well-watered lawn softens the surface and reduces visible tunnel ridges
The tunnels aren't damage. They're job sites š±