Holes
Chipmunks are commonly known for digging tiny holes all throughout your backyard and in your mulch beds. These holes lead to their complex tunnels which can spread throughout the soil underneath your yard and home.
Tunnels and burrows
Chipmunks are notorious for making deep burrows that are many feet long. They will create a clean sleeping quarter with many side-tunnels for waste and storing food. This ends up creating quite a network of tunnels, potentially resulting in weakened ground right under your house.
Damage
Chipmunks can cause a lot of damage. They consume a lot of food, so they will devour your flowers, plants, and garden items pretty quickly. They will also clean out your bird feeder if it is low enough to the ground.
If you end up with a chipmunk infestation, you could find yourself with a damaged deck or porch, which can become very expensive to repair. Chipmunks that get into homes and garages can cause even more damage.
Food caches
One of the more subtle signs of chipmunks is the discovery of small food stashes in attics, garages, crawl spaces, or under decks. Chipmunks gather and hoard food such as seeds, nuts, and grains, storing it in hidden locations to survive through the winter. These caches are often found in corners, insulation, or behind stored objects.
Droppings and urine
Like other rodents, chipmunks leave behind small, pellet-shaped droppings and urine stains along their travel paths or near their nests. You may notice a musty odor or dark streaks on walls and floors, particularly in garages, basements, or other secluded areas. These droppings not only indicate a presence but can also pose a health risk if not addressed promptly.