Signs of Groundhogs in Your Yard (and What to Do)
The signature groundhog sign is a burrow entrance 10–12 inches across with a large fan of excavated dirt spread in front of it, usually paired with one or more cleaner secondary exits nearby. Skunks and rabbits use burrows too, but they don't dig anything this large — a hole you could fit a volleyball into, with a wheelbarrow-load of soil outside, is groundhog work.
Key signs of groundhogs
- A main burrow entrance 10–12 inches in diameter with a broad fan or apron of excavated dirt spread in front of it
- One to four secondary 'plunge' holes nearby with little or no dirt around them — dug from below as emergency exits
- Burrow openings tucked against structures: under sheds, decks, porches, foundations, woodpiles, or along fence lines
- Vegetable garden plants — beans, peas, lettuce, broccoli, squash — eaten down to stubs in broad daylight, often a whole row at a time
- A chunky, grizzled brown animal the size of a large house cat seen grazing or sunning in daytime, or sitting upright near the hole
- Fresh claw marks and packed dirt paths radiating from the burrow to feeding areas
- Gnaw marks on low woody stems or the base of young fruit trees, and occasionally chewed deck boards or tubing
What the evidence looks like
| Sign | What it looks like | Where you'll find it |
|---|---|---|
| Main burrow entrance | A clean oval hole 10–12 inches across with a large fan of fresh dirt and small stones spread outside it | Under sheds, decks, and porches; along foundations, fence lines, and brushy field edges |
| Secondary exits | Smaller, tidier holes with no dirt fan, sometimes hidden in grass or under shrubs 10–40 feet from the main entrance | Scattered around the main burrow — dug upward from below, so the soil stays underground |
| Mowed vegetable rows | Plants clipped to short stubs, whole beds thinned overnight or over a few sunny days; wide, blunt bites rather than dainty nibbles | Vegetable gardens, clover and dandelion patches, low flower beds near the burrow |
| Daytime sightings | A stocky, waddling brown rodent grazing in the open morning and late afternoon, or standing upright to watch for danger | Lawn and garden within about 50–150 feet of the burrow — groundhogs rarely feed far from home |
| Worn travel paths | Flattened, packed runways in grass between the burrow and feeding spots | From the burrow entrance to the garden, usually along fences or building edges |
Habits worth knowing
Groundhogs (woodchucks) are the largest members of the squirrel family in most US yards, weighing 5–13 pounds. They are true hibernators and strict daytime feeders: expect activity from roughly February–March through October, with feeding concentrated in early morning and late afternoon. Unlike most yard wildlife, seeing one at noon is completely normal.
They are almost entirely vegetarian, favoring tender greens — clover, dandelion, plantain, and nearly everything in a vegetable garden. A single groundhog can eat more than a pound of vegetation a day, which is why a garden can look 'mowed' after just a few visits. They also climb better than people expect and will go over a low fence for good food.
A groundhog burrow system is substantial: 20–50 feet of tunnels reaching up to 5 feet deep, with a main entrance, a dirt fan, multiple chambers, and several plunge exits. One animal typically uses several burrows, and vacated burrows are quickly adopted by skunks, rabbits, foxes, and opossums — so an old groundhog hole rarely stays empty.
They are territorial and mostly solitary outside the spring breeding season. Females raise a litter of 2–6 kits that disperse in mid-summer, which is when new burrows suddenly appear in neighborhoods.
Often confused with
- Skunks — Skunks dig much smaller, shallower dens (or borrow old groundhog burrows) and leave small cone-shaped grub-digging holes in the lawn, not 10–12 inch entrances with big dirt fans. Skunk activity is at night; groundhogs feed in daylight.
- Rabbits — Cottontail rabbits in the US don't dig burrow systems — they rest in shallow, fur-lined depressions. Rabbits clip stems with clean 45-degree scissor cuts at ground level, while groundhogs take broad, ragged bites and can flatten whole plants.
What to do now
- Confirm the burrow is active: loosely stuff the entrance with crumpled newspaper or leaves and check in 24–48 hours — an active groundhog reopens it quickly
- Fence the garden properly: 3–4 feet of sturdy wire mesh with the top 12–15 inches left floppy and unattached (groundhogs won't climb a wobbly top) and the bottom bent outward 12 inches underground or in an L-footer to stop digging
- Harass an unwanted burrow in late summer or fall — clear the cover around it, and place used cat litter or sweat-scented rags just inside the entrance to encourage the animal to relocate on its own
- After you're certain the burrow is vacant, fill it with soil packed in stages, and screen vulnerable spots under sheds and decks with buried hardware cloth so it isn't re-dug or adopted by the next animal
- Remove easy attractants: harvest produce promptly, mow tall grass and clear brush piles that hide burrow entrances
- If a burrow runs under your foundation, porch, or shed slab — or fencing and harassment fail — contact a licensed wildlife control professional; trapping and relocation of groundhogs is regulated or prohibited in many states
What not to do
- Don't fill or seal a burrow until you've confirmed it's empty — entombing a groundhog (or the skunk that moved in) creates a bigger, smellier problem inside the tunnel system
- Don't use gas cartridges or fumigants in burrows near buildings — they're a fire and structural hazard under sheds and porches and are restricted in many areas
- Don't trap and relocate the animal yourself; many states prohibit relocating wildlife, and dumped groundhogs usually die or become someone else's problem
- Don't pour gasoline, ammonia, or other chemicals down the hole — it's illegal, contaminates soil and groundwater, and rarely works
- Don't corner or hand-catch a groundhog; they're strong rodents with large incisors and will bite and claw when trapped
Frequently asked questions
Will a groundhog burrow damage my foundation or shed?
It can. Groundhog tunnels run 20–50 feet long and up to 5 feet deep, and when they pass under a shed slab, deck footing, or foundation edge, the excavated soil can cause settling and cracking over time. A burrow entrance right against a structure is worth addressing promptly, not ignored.
How many groundhogs live in one burrow?
Usually just one — groundhogs are solitary outside the breeding season. A female with kits shares her burrow from spring until the young disperse in mid-summer. Multiple holes in your yard are more likely one animal's main entrance plus its emergency exits than a colony.
Why do I see the groundhog in the middle of the day?
Because that's normal. Groundhogs are strictly diurnal, feeding mostly in early morning and late afternoon. Unlike with raccoons or skunks, daytime activity in a groundhog is not a sign of rabies — though staggering, aggression, or paralysis in any mammal warrants a call to animal control.
If I get rid of the groundhog, is the problem over?
Not until the burrow is dealt with. Vacant groundhog burrows are prime real estate for skunks, rabbits, foxes, and the next groundhog. Once you've confirmed it's empty, fill it in stages and screen the area with buried hardware cloth so it can't simply be reopened.
What fence actually keeps groundhogs out of a garden?
Wire mesh 3–4 feet tall with two features most fences lack: the bottom buried or bent outward about a foot to defeat digging, and the top 12–15 inches left unattached and floppy so it bends back when the animal tries to climb. A rigid, shallow fence will be climbed or dug under.