Skunks, raccoons, and armadillos are the most common culprits when you wake up to find patches of turf peeled back or riddled with small holes. These animals are almost always after the same thing: beetle grubs living just below the surface of your soil. The animals are a symptom, not the root cause, and the fastest way to stop the digging is to eliminate the grub population that draws them in the first place.
The Usual Suspects
Several animals share the habit of tearing into lawns after dark to hunt for grubs and other soil-dwelling insects. Which ones visit your yard depends largely on where you live, but a handful of species account for the vast majority of overnight lawn damage across North America and Europe.
- Skunks: They use their front claws to dig small, cone-shaped holes a few inches across. The holes tend to be scattered rather than concentrated, because skunks sniff out individual grubs and dig one at a time.
- Raccoons: Raccoons do the most dramatic damage. They grip the turf with their front paws and peel it back in chunks or strips, sometimes rolling up large sections of sod like carpet. If your lawn looks like someone took a shovel to it, raccoons are the likely cause.
- Armadillos: Common in the southern United States, armadillos dig clusters of small holes about one to three inches deep. They tend to return to the same area night after night, creating a pockmarked appearance.
- Foxes and badgers: In the UK and parts of Europe, foxes and badgers are the primary offenders. Badgers in particular can cause extensive damage, ripping up substantial areas of turf to reach chafer grubs underneath.
- Wild boar and feral hogs: In rural areas, feral pigs root through turf with their snouts, leaving large, churned-up patches that look less like digging and more like a small plow went through.
Moles are sometimes blamed, but moles create raised tunnels and conical mounds rather than torn-up patches of grass. If the damage involves surface disruption with the turf pulled apart, you’re dealing with one of the animals listed above, not moles.
Why They All Want Your Lawn
The connection between nocturnal digging and grubs is so consistent that experienced groundskeepers treat lawn damage as a grub detector. White grubs are the larval stage of several beetle species, including Japanese beetles, European chafer beetles, and June bugs. These C-shaped larvae live in the top two to four inches of soil and feed on grass roots, and they’re packed with protein, which makes them irresistible to just about any omnivorous or insectivorous animal in the neighborhood.
Grub populations peak at predictable times of year. Adult beetles lay eggs in lawns during summer, and those eggs hatch into small larvae that feed through autumn and into early winter before burrowing deeper to overwinter. The worst lawn-digging episodes tend to happen in late summer through autumn, when grubs are large enough to attract predators but still close enough to the surface to be worth digging for. A secondary wave of damage sometimes occurs in spring when overwintered grubs move back toward the surface to resume feeding before pupating into adult beetles.
Earthworms and other soil invertebrates can also attract digging animals, but grubs are the primary draw. If you pull back a section of damaged turf and find several white, curled larvae per square foot, you’ve confirmed the connection.
Reading the Damage to Identify the Animal
You don’t usually need a trail camera to figure out which animal is visiting, though cameras certainly help. The pattern of damage is often enough.
Skunk damage looks like someone poked dozens of small holes across the lawn with a stick. Each hole is roughly the size of a quarter to a golf ball. The turf stays mostly intact between the holes. Raccoon damage is messier and more violent: torn-up flaps of sod, sometimes large sections rolled back. If the grass underneath the flap is still green and relatively undamaged (aside from being upside down), you likely caught the problem early and the grubs haven’t yet destroyed the root system.
Armadillo damage falls somewhere between the two, with lots of shallow divots close together, often concentrated along a path the animal followed. Badger damage tends to be deep and focused in one area, with claw marks visible in the exposed soil. Fox digging is shallower and more scattered, sometimes resembling skunk damage but with slightly larger holes.
Fresh droppings near the damage can also help. Raccoon droppings are segmented and often found on flat surfaces nearby. Skunk droppings contain visible insect parts. And if you live in armadillo territory, their small, marble-shaped droppings are distinctive.
Solving the Grub Problem First
Chasing away the animals without addressing the grubs is a losing strategy. They’ll come back, or different animals will take their place. The most effective long-term approach is reducing the grub population below the threshold that attracts digging.
A healthy lawn can tolerate a few grubs per square foot without visible damage or animal attention. The trouble starts when populations climb above roughly five to ten grubs per square foot, depending on the grass species. At that density, the grass itself begins to weaken, which makes the turf even easier for animals to tear apart.
Chemical grub treatments fall into two categories: preventive and curative. Preventive products contain ingredients that target newly hatched larvae and work best when applied in early to mid-summer, before grub damage becomes visible. Curative products are designed to kill larger, established grubs and are applied in late summer or early fall when you can already see damage. Curative treatments work faster but are less reliable against large grubs that have burrowed deep. Timing is everything with grub control; a perfectly good product applied at the wrong time of year will accomplish nothing.
If you prefer to skip chemical treatments, biological options exist. Entomopathogenic nematodes, specifically species like Heterorhabditis bacteriophora, are microscopic roundworms that actively seek out grubs in the soil and infect them with bacteria that kill the larvae within a day or two. These nematodes are sold commercially and applied to the lawn with a watering can or sprayer. Research on Japanese beetle grubs has shown that mulched ground conditions can improve nematode effectiveness, since the soil stays moister and nematode survival improves, while also suppressing adult beetle populations more broadly.1PubMed Central. Mulches Used in Highbush Blueberry and Entomopathogenic Nematodes Affect Mortality Rates of Third-Instar Popillia japonica Nematodes require moist soil and moderate temperatures to work, so they’re best applied in late summer or early fall during the evening, followed by thorough watering.
Milky spore disease is another biological option that specifically targets Japanese beetle grubs. It takes one to three years to fully establish in the soil but can provide long-term suppression once it does. It won’t help with chafer grubs or other species, though, so knowing which beetle species is responsible matters.
Deterrents That Buy You Time
While you wait for grub treatments to take effect, you can discourage animals from digging with physical and sensory barriers. None of these are permanent solutions if grubs remain, but they can reduce damage during the weeks it takes for biological or chemical controls to work.
Laying garden netting or chicken wire flat over the affected areas is the most reliable short-term fix. Secure the edges with landscape staples so animals can’t simply push the netting aside. Skunks and raccoons will often give up when they encounter a physical barrier, since the food isn’t worth the effort of working through mesh. Remove the netting once you’ve mowed a couple of times after grub treatment, as long-term netting can inhibit grass growth.
Motion-activated sprinklers startle nocturnal visitors and work well for a few nights, though raccoons in particular tend to get used to them quickly. Rotating the sprinkler’s position every few days helps. Motion-activated lights are less effective; most of these animals are not particularly bothered by illumination.
Capsaicin-based repellent sprays applied to the lawn surface can deter skunks, but they wash off in rain and need frequent reapplication. Castor oil granules are sometimes recommended as a mole and grub deterrent, though the evidence for their effectiveness is thin. Commercial animal repellents containing predator urine (fox urine for raccoons, coyote urine for skunks) have mixed results in practice. They may work for a few days but lose effectiveness as the animals habituate.
One approach that doesn’t work: spreading mothballs or ammonia-soaked rags around the lawn. Aside from being ineffective, mothballs contain naphthalene, which is toxic and shouldn’t be scattered in a yard where children, pets, or wildlife can contact it.
When Grubs Aren’t the Problem
Not all nocturnal digging is grub-related. If you check under damaged turf and find no grubs, a few other possibilities are worth considering.
Raccoons and skunks also dig for earthworms, especially after rain when worms move close to the surface. This type of damage tends to be lighter and more superficial than grub-related digging. Squirrels bury and retrieve nuts, leaving small, individual holes that are easy to distinguish from grub-hunting patterns because they’re narrow and deep rather than scraped at the surface.
Rabbits occasionally dig shallow scrapes in lawns, but they’re usually creating nesting spots rather than foraging. These scrapes are typically in one location and don’t spread across the lawn. Rats can also dig holes in lawns, but they tend to create burrow entrances near walls, fences, or structures rather than digging across open turf.
In some regions, crawfish (crayfish) create chimney-like mud mounds in wet lawns. These look nothing like animal digging and are a drainage issue rather than a pest problem. If your lawn stays soggy and you find small towers of rolled mud pellets, crawfish are the likely cause, and improving drainage is the fix.
Repairing Torn-Up Turf
Once you’ve addressed the grub population and the nighttime visits have stopped, you’ll want to repair the damage. If the torn-up sod pieces are still relatively fresh (pulled up within the last day or two), you can often just flip them back into place, press them down firmly, and water thoroughly. The grass will usually reroot within a couple of weeks if the root system hasn’t been completely destroyed by grubs.
For older damage where the sod has dried out or the soil underneath has been heavily disturbed, rake the area smooth, add a thin layer of topsoil or compost, and overseed with a grass variety that matches your existing lawn. Keep the reseeded area consistently moist for two to three weeks. Fall is the best time to reseed cool-season grasses, which works out conveniently since fall is also when most grub damage occurs.
If grubs have destroyed the root system over a large area, the turf may feel spongy and pull up easily even without animal help. In severe cases, you may need to remove the dead turf entirely, amend the soil, and either reseed or lay new sod. Treating for grubs before re-establishing the lawn is essential, otherwise you’re just setting the table for the next round of digging.
Lawn Care Practices That Reduce Grub Appeal
Certain lawn management habits make your yard less attractive to egg-laying beetles in the first place. Adult Japanese beetles and chafer beetles prefer to lay their eggs in closely mowed, well-watered, sun-drenched turf. Allowing your grass to grow slightly taller during peak egg-laying season (usually June and July) can make the lawn less appealing as a nursery.
Reducing irrigation during the same window helps as well. Beetle eggs and young larvae need moisture to survive, and a lawn that dries out somewhat between waterings during early summer can experience naturally lower grub survival. This is a balancing act, of course, since your grass also needs water, but cutting back from daily watering to every few days during peak beetle season is usually enough to make a difference without stressing the turf.
Overseeding with endophyte-enhanced grass varieties is another longer-term strategy. Certain fescues and ryegrasses contain naturally occurring endophytic fungi that produce compounds toxic to surface-feeding insects. These endophytes don’t directly kill grubs (which feed on roots below the endophyte zone), but they reduce the overall insect load in the lawn, which can make the turf less attractive to foraging animals. Endophyte-enhanced seed is widely available from turf suppliers.
Healthy, dense turf also recovers faster from both grub feeding and animal digging. A lawn with a strong root system can tolerate moderate grub populations without thinning, which means the turf stays intact enough that animals can’t easily rip it apart even if a few grubs are present. Regular fertilization, proper mowing height, and core aeration all contribute to the kind of root density that resists both grubs and the animals that hunt them.
Armadillo-Specific Challenges
Armadillos deserve their own mention because they don’t respond to the same deterrents that work on skunks and raccoons. They have poor eyesight, limited hearing, and a relatively low sensitivity to smells, which makes repellent sprays, motion lights, and noise devices largely useless against them. They also eat a wider variety of soil invertebrates than raccoons or skunks, so even eliminating grubs doesn’t always stop an armadillo from visiting if your soil has a healthy earthworm or ant population.
The most effective armadillo deterrent is a physical barrier. A fence buried at least twelve inches underground and extending at least two feet above ground will keep them out of a specific area. Armadillos are surprisingly strong diggers, so the buried portion is important. Live trapping and relocation is legal in some states but regulated in others, so check your local wildlife agency before attempting it.
In areas where armadillos are a persistent problem, some homeowners eventually accept a certain amount of lawn damage as the cost of living in armadillo territory. The animals do provide a genuine benefit by consuming enormous quantities of fire ants, ticks, and other pest insects. Whether that trade-off is worth the cosmetic damage to your lawn is a personal call.