Active vs. Abandoned Sign

Lesson 6 of 18 · Module 2, lesson 2

Assumes the Hunting Primer. New here? Start there first.

Your objective

By the end, you'll be able to distinguish a worked, active groundhog burrow from an abandoned one by reading the four key signs: fresh diggings, packed runs, clipped vegetation, and scat location.

Identification ~8 min

You’ve found a field edge with three burrow holes spaced along the fence row. But do animals actually live there right now, or did something evict them last season and a fox move in? Setting up on dead ground wastes your best morning. Here’s how to read the sign and know before you commit.

Quick recall

Quick recall from Reading the Burrow — what is the key physical difference between a main burrow entrance and a secondary (plunge) entrance?

The main entrance has a large soil mound outside it; secondary entrances lack a mound Secondary entrances are always larger than the main entrance The main entrance goes deeper; secondary entrances are shallow surface scrapes

Show answer

Correct: The main entrance has a large soil mound outside it; secondary entrances lack a mound — Exactly right. Secondary entrances are dug from inside — the soil goes back into the tunnel or is dispersed underground — so there's no external mound. Spotting mound vs. no-mound is your first active/abandoned read.
Not quite: Secondary entrances are always larger than the main entrance — It's the opposite pattern: the main entrance tends to be wider and is always marked by a mound. Secondary holes are often narrower plunge-entrances without a mound — dug as quick escape routes.
Not quite: The main entrance goes deeper; secondary entrances are shallow surface scrapes — Both connect to the same burrow network. The distinguishing feature is the soil mound: it's always at the main entrance and never at a secondary one.

Sign #1 — Fresh diggings at the main entrance

The main entrance mound is your first and most readable clue. An active mound looks and smells different from a dead one.

Active: the mound is large (often the size of a bushel basket), loose, and the soil looks recently turned — darker, wetter, or lighter in color than the surrounding surface depending on the subsoil. You may see claw marks in the dirt from the last digging session. The mound is not compacted by rain or carpeted by re-growing grass.

Abandoned: the soil has settled and compacted. Grass or weeds may be reclaiming the mound. The color blends back into the surrounding ground. The opening may be partially collapsed or choked with debris.

Freshly excavated soil after a rain is especially clear — wet disturbed earth stands out sharply. Rain also prompts groundhogs to clean and renew their entrances, so a day after a soaking rain is a good time to check active status.

Edge case What else uses an abandoned burrow?

An abandoned groundhog burrow doesn’t stay empty long. Rabbits, raccoons, foxes, skunks, opossums, weasels, and snakes all use old groundhog dens for shelter. This matters for identification: if you see fur, feathers, or coyote scat at a hole with a weathered mound, you’re likely looking at secondary tenants, not a live groundhog. The mound freshness and the signs in the next sections will help you tell the difference.

Sign #2 — The packed run and belly-drag trail

Between the burrow entrance and the animal’s feeding zone, frequent use compresses the soil into a smooth, hard-packed path. This is different from the loose mound soil — it’s worn down, almost polished looking.

Look for the belly-drag trail specifically: a low, slightly sunken groove in the vegetation or bare soil where the groundhog’s belly has cleared the stubble repeatedly. It fans out from the entrance in the direction of the feeding area. Fresh belly-drag shows recently flattened stems; old drag trails are overgrown or absent.

A visible run with bare, compressed earth is strong evidence of current use. No run, or a run that is re-vegetating, points toward abandonment.

Sign #3 — Clipped vegetation

Groundhogs are precise feeders. They clip clover, alfalfa, grass stems, and forb leaves cleanly, leaving cut stubble — not torn or jagged edges like deer browse. Fresh clips are pale, moist at the cut face, and have no browning at the edge. Older cuts brown and dry.

Look for clipped stems in the feeding radius around the entrance — typically within 50–150 feet. A cluster of recently clipped clover or alfalfa near the mouth of the burrow is a strong freshness indicator. If the surrounding vegetation is tall and untouched right up to the entrance, no one’s been feeding there.

The why Groundhog diet and what fresh clips look like by season

In the Piedmont spring and early summer, groundhogs feed heavily on clover, alfalfa, plantain, and fresh grasses. By midsummer they shift toward whatever is lush and available — garden crops, soybean shoots, and heavy-seeded grasses. Clipped clover or alfalfa within 100 feet of a burrow is the clearest feeding sign because it’s a preferred food and the cut is distinctive. Later in the season, look for nibbled soybean plants or stripped corn husks near field edges. By October, activity drops as the animal begins preparing to hibernate — so summer (May through September) is peak sign-reading season in the Piedmont.

Sign #4 — Scat location and appearance

Groundhogs maintain dedicated toilet chambers inside the burrow — a behavioral adaptation that keeps the nest sanitary and reduces surface scent. This means you will rarely find scat right at the entrance in the way you would with, say, a fox or raccoon.

When scat is visible outside, it is typically found near the entrance or a short way down the run. Fresh scat is dark brown to nearly black, roughly oval-shaped, smooth and firm, about 1/2 to 3/4 inch long — somewhat like elongated deer pellets, but larger and often grouped rather than scattered as a pile. Old scat is pale, crumbly, and may be sun-bleached.

The absence of scat near an opening does not mean absence of an animal — the toilet-chamber habit is the reason. But fresh scat near the entrance is a strong positive confirmation of recent use.

Read this burrow system

Explore the signs on a real burrow complex. Each marker explains what you’re seeing and what it means for active or abandoned status.

Explore

Tap each marker to read the sign and its meaning.

Schematic showing a groundhog burrow system from above. A large dark-soil mound marks the main entrance at left-center. A worn, dark-colored run leads from the mound toward the upper right. Clover plants appear clipped in the upper right quadrant. Small dark scat pellets appear along the run. A second hole without a mound appears at lower right, marking a secondary entrance.

Tell it apart — mixed burrow sign

Identification is sharper when you mix the categories. These questions jump between features and freshness — answer each on its own.

Knowledge check

You approach a burrow hole and the mound outside it is compact, grey-brown, and has grass growing through it. The surrounding area shows no clipped vegetation. What is the most likely status?

Abandoned — not worth setting up here Active — the animal is probably inside right now Secondary entrance — the main hole is nearby

Show answer

Correct: Abandoned — not worth setting up here — Correct. A grass-covered, compacted mound without fresh digging or feeding sign is a strong indicator of an abandoned or long-inactive burrow. Move down the fence row and look for fresh excavation.
Not quite: Active — the animal is probably inside right now — An active mound looks recently turned — loose, dark, and claw-marked. Grass growing through a compacted mound means no one has been maintaining it. Look for fresher sign elsewhere.
Not quite: Secondary entrance — the main hole is nearby — Secondary entrances lack a mound entirely — they have no soil pile outside. This hole has a mound, but an old, weathered one. That points to abandonment, not a secondary entrance.

Knowledge check

Walking a hay field edge, you find a burrow with a fresh dark-soil mound, a smooth compressed run leading into the clover, and several pale cleanly-cut clover stems within 60 feet of the hole. What does this tell you?

This burrow is actively used — worth setting up on This is old sign — the vegetation damage happened last season This is likely a fox den, not a groundhog burrow

Show answer

Correct: This burrow is actively used — worth setting up on — Right. Three active indicators at once: fresh mound, worn run, and fresh vegetation clips near the entrance. This is exactly the kind of sign that earns a stand setup. Check for secondary entrances, pick your position, and come back early morning or late afternoon.
Not quite: This is old sign — the vegetation damage happened last season — Old clips are brown and dried at the cut edge. Pale, moist cut stems are fresh. Combined with a freshly turned mound and a packed run, all three signs point to current activity, not last season.
Not quite: This is likely a fox den, not a groundhog burrow — A fresh soil mound at the entrance is a groundhog signature — foxes don't typically maintain prominent mounds. Clipped vegetation is also a herbivore sign, not a predator sign. All indicators here point groundhog.

Knowledge check

You walk up to a burrow hole that has no soil mound outside it at all. The ground around the opening is bare and slightly hardened. What type of entrance is this most likely to be?

A secondary (plunge) entrance — dug from inside, no external mound An abandoned main entrance where the mound has fully eroded Not a groundhog burrow — another animal entirely

Show answer

Correct: A secondary (plunge) entrance — dug from inside, no external mound — Correct. Secondary entrances are excavated from the inside, so the spoil goes back into the system rather than piling outside. No mound = plunge hole. The main entrance with its mound will be nearby, usually 10–30 feet away.
Not quite: An abandoned main entrance where the mound has fully eroded — A mound can settle and erode over time, but a truly secondary entrance was never mounded — it is a deliberate design feature of the burrow. If the surrounding soil is bare and hardened (worn, not weathered), you're likely looking at a secondary entrance in active use.
Not quite: Not a groundhog burrow — another animal entirely — This is exactly what a secondary groundhog entrance looks like. Groundhog systems almost always include one or more secondary plunge holes without soil mounds. Walk a 30-foot radius and you'll likely find the main entrance with its mound.

Take it to the woods

Burrow sign assessment: is anyone home?

0/6

Check the entrance mound: is it loose and recently turned, or compacted and grass-covered?
Look for a worn run or belly-drag trail from the entrance toward open feeding ground.
Within 100 feet of the entrance, look for cleanly clipped clover, alfalfa, or grass stems.
Check near the entrance and along the run for fresh dark oval pellets (uncommon but confirming).
Walk a 30-foot radius to find any secondary holes — no mound, slightly compressed entrance.
Make a call: active (3+ fresh indicators) or abandoned (settled mound, no run, no clips). Only set up on active sign. Cold ground wastes your best time of day.

Sources

Connecticut DEEP Woodchuck Fact Sheet: https://portal.ct.gov/DEEP/Wildlife/Fact-Sheets/Woodchuck
Penn State Extension — Woodchucks: https://extension.psu.edu/woodchucks
Massachusetts Audubon — Woodchucks/Groundhogs: https://www.massaudubon.org/nature-wildlife/mammals-in-massachusetts/woodchucks-groundhogs
Vermont Fish and Wildlife — Woodchuck: https://www.vtfishandwildlife.com/learn-more/vermont-critters/mammals/woodchuck
Critter Control — Woodchuck Droppings: https://www.crittercontrol.com/wildlife/woodchuck/woodchuck-droppings/
Mossy Oak — Groundhog Hunting: https://www.mossyoak.com/our-obsession/blogs/small-game/groundhog-hunting-how-to-hunt-groundhogs

If you remember nothing else

An active main entrance has a prominent mound of fresh, loose, recently turned soil; an abandoned entrance has settled, weathered, often vegetation-covered soil.
Packed, compacted soil and a worn belly-drag trail from the mound into the feeding area signal an animal using the burrow right now.
Clipped vegetation — cleanly cut stems of clover, alfalfa, or grass stubble — near the entrance or along a run is a reliable fresh-use indicator.
Groundhogs use dedicated toilet chambers inside the burrow; visible scat directly outside the entrance is uncommon but confirms recent activity when present.
Secondary entrances are dug from inside out and lack soil mounds — a subtle feature that marks an active system once you know to look for it.

How ready do you feel?

How ready are you to walk up to a burrow, read its sign, and confidently decide whether to set up there or keep looking?

Before you go — a quick look back

Distributed practice: one fast recall from an earlier lesson keeps it from fading.

Quick recall

From Where to Look — what is the single most productive habitat feature that tells you a field edge is worth checking for burrows?

Show me the answer

Show answer

Correct: Show me the answer — A brushy fence row, tree line, or other edge cover bordering open agricultural ground. The field-to-woodland edge overlaps food (the field) with escape cover and easy-digging soil — the exact combination groundhogs need. That edge strip is where burrows concentrate.

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