If you are asking for another name for roly poly bug, the answer is pillbug, and in many yards people also call it a sowbug. These little gray creatures show up where soil stays damp, then wander into basements, garages, and mulch beds looking for moisture. Knowing what a roly poly bug is, and what roly poly bugs are called in different places, helps you tell a harmless moisture lover from a pest problem that points to wet wood or heavy mulch against the house.
What a Roly Poly Bug Is
A roly poly bug is a small land-dwelling crustacean, not an insect. It has a hard, segmented shell, seven pairs of legs, and the ability to curl into a ball when disturbed. That rolling behavior is what gives it the common name roly poly. In gardens and around foundations, pillbugs feed on decaying plant matter, so they are a sign of damp organic debris, not a direct threat to people or pets.
Pillbug or sowbug
The two names point to close relatives, but they are not the same. Pillbugs roll into a tight ball. Sowbugs do not curl fully, and they have two little tail-like appendages at the rear. Both live in dark, moist places and enter homes through gaps at doors, crawl spaces, and utility penetrations when the outside conditions stay wet.
What Roly Poly Bugs Are Called in Different Places
The name changes, but the creature stays the same. Homeowners in the US hear pillbug, roly poly, potato bug, doodlebug, and woodlouse, depending on region and habit. For searchers asking what are roly poly bugs called, the safest everyday answer is pillbugs and sowbugs, with pillbug being the most common term for the ball-curling kind.
Why the names matter
Using the right name helps you match the bug to the right control step. If the pest curls into a ball, you are dealing with a pillbug. If it stays flat and scuttles away, it is a sowbug. Both respond to the same fix, which is to dry out the conditions that attract them.
Why They Show Up Around Homes and Gardens
Pillbugs and sowbugs need moisture to survive. They gather under mulch, boards, leaf piles, stones, compost, and damp pots. Around a house, they move toward leaky hose bibs, clogged gutters, wet crawl spaces, and mulch stacked against siding. Inside, they are not looking for food sources in the way ants do, they are escaping dry ground and following moisture.
Where to look first
Check these spots right away:
- Mulch touching the foundation
- Downspouts that dump water next to the house
- Leaky exterior faucets and irrigation heads
- Planters sitting on wet soil
- Stacked firewood, boards, and landscape timbers
- Basement floor cracks, crawl space vents, and door sweeps
How to Control Pillbugs and Sowbugs Around the House
The best control is moisture reduction plus barrier cleanup. Do not rely on sprays alone. If the habitat stays damp, they return. Focus first on the conditions that make your yard and foundation attractive, then use a targeted treatment only where you see activity.
- Pull mulch back 6 inches from the foundation and keep it no deeper than 2 to 3 inches.
- Clean gutters and extend downspouts at least 4 to 6 feet away from the house.
- Fix dripping hose bibs, irrigation leaks, and air conditioner condensate that pools near walls.
- Remove leaf piles, rotting boards, and clutter from porch edges, crawl spaces, and flower beds.
- Seal cracks, gaps around pipes, and openings at thresholds with exterior caulk or foam rated for pest entry points.
- Apply a perimeter treatment labeled for pillbugs and sowbugs to cracks, voids, and the base of exterior walls.
For products, choose a residual insecticide labeled for exterior perimeter use and listed for pillbugs or sowbugs on the label. Common active ingredients in homeowner products include bifenthrin, cyfluthrin, permethrin, and lambda-cyhalothrin. Apply only to labeled areas, never to beds where bees are active, and keep spray off edible leaves unless the label allows it.
Garden Damage and Moisture Problems
Pillbugs feed on decaying matter first, but they chew seedlings, ripe strawberries, soft vegetables, and low fruit that touch damp soil. The real garden problem is not just the bug, it is the wet habitat that lets populations build up. Seedlings at ground level and fruit resting on mulch are the first things to suffer.
Garden fixes that work
Use clean straw or dry mulch, not a thick wet layer pressed against stems. Raise fruit on supports, water early in the day, and avoid soaking the soil every evening. If you use traps, place a board or damp newspaper near the bed overnight, then pick up and discard the bugs in the morning. This reduces numbers fast without treating the whole garden.
When to Call a Pro
Call a pest control company when pillbugs show up inside every rainy week, when you see them in a basement or crawl space in large numbers, or when moisture problems point to hidden leaks. If you have siding rot, standing water, or chronic wet mulch around the slab, pest treatment alone will not solve the issue. A pro can treat the perimeter and help identify the moisture source that keeps drawing them in.