Has there been an explosion of chipmunks this year? Yes. Here’s why

CANTON ‒ If you have been seeing more chipmunks near your yards and gardens this year, you aren’t alone.

And it was expected, says the Ohio Department of Natural Resources.

“2025 was an exceptionally hard mast year for trees in Ohio which means a surplus in food for small rodents like chipmunks,” said Monika Bowman, wildlife communications specialist for the state agency. “More food leads to more chipmunks in a cyclical nature that we expect to see.”

A mast year is when trees and other plants, such as oak drop more acorns and other seeds, which are a main source of food for chipmunks.

Chipmunks also reproduce twice a year.

“Unlike some other small rodents, chipmunks have two mating seasons,” Bowman said. “We’re coming up on the second one at the beginning of summer, so more chipmunks would be in gardens to prepare.”

Chipmunks can damage homes and gardens. They love to burrow in mulch and under logs, said Curtis Daye of Canton-based Day & Night Pest Control.

“The best thing to do to prevent animals like chipmunks from getting into your yard is to get it treated early with granular deterrents,” Daye said. “It’s safer for the yard and the chipmunks, too.”

These deterrents include plant-based remedies like peppermint and capsaicin, which can also be used to prevent chipmunks in your yard if getting it treated isn’t an option.

Chipmunks love birdseed

One food that really attracts chipmunks is birdseed.

“They really love birdseed. Chipmunks see it and say, ‘Thanks for the buffet,’” Bowman said.

Interestingly though, birds don’t need birdseed to feed on during the summer months as they can consume insects and native plants, “but if you are going to use it, add in a spicy mix to prevent chipmunks from eating it, too,” Bowman recommended.

ODNR also suggested using birdhouses on metal posts that chipmunks can’t climb.