Small Holes in Yard With No Mound: What's Digging?

Small holes in your yard with no dirt mound are usually caused by squirrels, chipmunks, foraging birds, earthworms, or ground-nesting insects. The size of the hole, how deep it goes, the time of year, and whether the damage appeared overnight can narrow down the cause quickly.

Most likely causes

  • Squirrels digging up (or burying) nuts — shallow, messy divots
  • Chipmunks — clean 2-inch tunnels with no soil pile
  • Birds probing for grubs — shallow cone-shaped pokes
  • Ground-nesting bees or wasps — pencil-width holes in thin turf
  • Earthworms — pencil-size openings with tiny soil granules

Compare the possible causes

Possible cause Key signs When it happens How likely
Squirrels Shallow divots 1–3 inches wide, dug and abandoned; often dozens scattered across the lawn Fall (burying) and late winter through spring (digging up caches) Very common
Chipmunks Clean, round holes about 2 inches across that drop straight down, with no soil around the entrance Spring through fall, often near foundations, walls, or wood piles Common
Foraging birds Shallow, cone-shaped holes about an inch wide, often many in one area of the lawn Morning, especially in spring and late summer when grubs are near the surface Common
Ground-nesting bees and wasps Pencil-width holes in dry, thin, or sandy turf, sometimes with a bee hovering low nearby Spring for mining bees; mid to late summer for cicada killers and yellowjackets Common
Earthworms Pencil-size openings, sometimes with tiny crumbly soil granules (castings) nearby After rain and in cool, wet weather in spring and fall Very common

Visual clues to check

  • Measure the hole: pencil-width points to insects or worms; 1 inch to birds or squirrels; a clean 2 inches to chipmunks
  • Check the depth: shallow divots that stop within an inch or two are foraging; holes that drop straight down are burrows
  • Look for scattered soil: truly no soil at all suggests chipmunks; flicked-aside soil suggests squirrels
  • Note the timing: fall and early spring divots point to squirrels; holes appearing after rain point to worms
  • Watch for traffic: insects flying in and out of one hole in summer means a ground nest — observe from a distance
  • Count and pattern: dozens of shallow pokes in one patch suggest birds feeding on grubs below

The causes in detail

Squirrels

Squirrels dig small, shallow holes to bury nuts in fall and to retrieve them later. The holes look like someone pressed a golf ball into the turf and flicked the soil aside — no tunnel, no mound, and the grass around them is undisturbed. They're untidy but harmless, and the lawn usually recovers on its own.

Chipmunks

Chipmunks carry excavated soil away in their cheek pouches, which is why their burrow entrances are famously tidy — a clean 2-inch hole with no mound at all. Entrances tend to be near cover: along foundations, under steps, beside retaining walls or shrubs. A single chipmunk burrow is rarely a problem; many entrances near a foundation or retaining wall are worth watching.

Foraging birds

Robins, starlings, and flickers probe lawns for grubs and earthworms, leaving small conical pokes in the turf. If you see birds working the same patch of lawn every morning, they're telling you something: heavy bird activity often means a healthy worm population, but a sudden frenzy can indicate a grub infestation worth checking.

Ground-nesting bees and wasps

Solitary mining bees make small holes in thin turf in spring; they're docile, rarely sting, and are excellent pollinators — most experts recommend leaving them alone for the few weeks they're active. Late-summer holes with heavy wasp traffic in and out of a single opening are different: that can be a yellowjacket nest, which you should not approach or plug.

Earthworms

Earthworm burrows are the smallest holes on this list and the best news: worms aerate soil and their castings feed the lawn. The openings become visible after rain washes turf flat or when worms surface at night. No action needed — a wormy lawn is a healthy lawn.

When to worry

  • Steady insect traffic in and out of a single hole in late summer — possible yellowjacket nest; keep kids and pets away
  • Many burrow entrances appearing along a foundation, retaining wall, or under a stoop
  • Birds tearing at the lawn in flocks while patches of turf turn brown and lift easily — check for grubs
  • Holes accompanied by gnaw marks on irrigation lines, cables, or plant roots

What to do now

  1. Measure and photograph a few holes so you can compare them against the guides for each animal
  2. Check the holes in the early morning — most diggers work at night or dawn, and fresh soil tells you the hole is active
  3. Tug on the turf near shallow bird pokes: if it lifts like carpet, sample a square foot for white C-shaped grubs
  4. For squirrel and bird foraging, simply rake the divots flat and overseed if needed — the lawn recovers quickly
  5. If you suspect a yellowjacket nest, mark the area from a distance and call a pest control professional

What not to do

  • Don't pour gasoline, bleach, or boiling water into holes — it's dangerous, illegal in many places, and kills the soil
  • Don't plug a hole with active insect traffic; yellowjackets will find another way out, sometimes indoors
  • Don't put your hand or fingers into any burrow
  • Don't blanket the lawn with insecticide before confirming what you're dealing with — most of these diggers are harmless or beneficial

Think you know the suspect?

These animals commonly cause this clue — see their full sign profiles:

Frequently asked questions

Why are there small holes in my yard but no dirt anywhere?

A hole with no soil around it usually means the digger carried the soil away — the signature of chipmunks, which haul excavated dirt off in their cheek pouches. Very small, clean openings can also be earthworm burrows or old insect emergence holes.

Do these holes mean I have moles?

Probably not. Moles almost always announce themselves with volcano-shaped mounds or raised surface tunnels. Small open holes with no mound point to squirrels, chipmunks, birds, or insects instead.

Will the holes damage my lawn?

Squirrel divots, bird pokes, and worm holes are cosmetic — rake them flat and the grass fills in. The exceptions worth acting on are grub infestations (which birds may be revealing) and yellowjacket nests, which are a safety issue rather than a lawn issue.

Should I fill the holes in?

Yes, once you know they're inactive. Fill with topsoil, press firm, and overseed. If a hole reopens within a day or two, something is still using it — identify the animal before filling again.

Related yard clues

Yard Holes One-Inch Holes in Lawn: Identify the Digger by Size Holes about an inch wide in a lawn are most often the work of voles, young chipmunks, ground-nesting bees, or — in wet, low-lying yards — crayfish. An inch is a telling size: it's too big for most insects and too small for rats or full chipmunk burrows, so checking depth, soil, and location will usually name the digger. Read the guide → Yard Holes Two-Inch Holes in Yard: Chipmunk, Rat, or Something Else? A round hole about two inches across is classic burrow size, and the usual suspects are chipmunks, rats, and thirteen-lined ground squirrels. Chipmunk holes are clean with no soil pile, rat holes are worn and hug structures, and ground squirrel holes sit in open, sunny lawn — those three clues sort out most cases. Read the guide → Yard Holes Dirt Mounds in Lawn: Mole, Gopher, or Ant? Read the Shape The shape of a dirt mound is the fastest identification tool in the yard: moles build round volcano-shaped mounds with no visible hole, pocket gophers build fan- or crescent-shaped mounds with a plugged hole to one side, and ants, earthworms, and digger bees leave much smaller piles. Match your mound to one of those shapes and you've usually named the animal. Read the guide → Yard Holes Holes in Yard After Rain: Why They Appear Overnight Holes that appear after a good rain are usually not new digging at all — rain exposes earthworm burrows, washes open old animal tunnels, and collapses settling soil, while wet weather brings crayfish and emerging cicadas to the surface. Most rain-revealed holes are harmless; the size and what surrounds each hole tells you which kind you have. Read the guide → Yard Holes Shallow Divots in Lawn: Foraging Damage Decoded Shallow divots — little scoops that stop within an inch or three of the surface — are foraging marks, not burrows: squirrels caching and retrieving nuts, skunks drilling for grubs at night, birds probing at dawn, or a dog freelancing. Because three of those four are hunting grubs, a lawn suddenly covered in divots is often really a message about what's living under the turf. Read the guide →

Still not sure? Compare with these clues

Yard Holes Quarter-Size Holes in Yard: Wasps, Cicadas, or Voles? Holes about the size of a quarter — roughly an inch across — most often belong to cicada killer wasps, emerging cicadas, ground-nesting bees, or voles. The soil is the fastest clue: a big horseshoe of excavated dirt means a cicada killer, a clean hole with no soil means a cicada came out of it, and a small crumbly rim means bees. Watch briefly from a distance before getting close, in case wasps own it. Read the guide → Yard Holes Tunnels in Grass: Mole or Vole? How to Tell in Seconds Tunnels in a lawn come in two distinct styles: raised, spongy ridges you can feel underfoot are mole feeding tunnels just below the surface, while flat, worn trails clipped into the grass itself are vole runways. Moles hunt worms and grubs under your turf; voles eat the grass and bark on top of it — so telling them apart decides everything about what to do next. Read the guide → Yard Holes Holes Near Your Foundation: Causes and When to Act Holes right along a foundation usually come from chipmunks, Norway rats, or voles, all of which like the shelter a house wall provides — but water pouring from downspouts and settling backfill soil carve foundation-line holes too. Sorting burrow from washout matters, because a rat burrow against the house is the one that needs fast professional attention. Read the guide → Lawn Problems Grass Torn Up in Patches Overnight: Who's Digging and Why Grass torn up in patches — especially damage that appears overnight — is almost always an animal digging for grubs under your turf. Raccoons flip and roll back chunks of sod, skunks drill small cone-shaped holes, and crows peck and pull tufts by day. The digger is the symptom; the grubs underneath are the cause. Read the guide →