Sowbugs & Pillbugs
Extremely common in Maine basements and crawl spaces, these moisture-loving crustaceans indicate damp conditions.
About Sowbugs & Pillbugs in Central Maine
Sowbugs and pillbugs (roly-polies) are not actually insects — they're terrestrial crustaceans, more closely related to shrimp and lobsters than to ants or spiders. They breathe through gill-like structures and require constant moisture to survive. In Central Maine, they're extremely common in basements, crawl spaces, garages, and around foundations where dampness accumulates. Pillbugs roll into a tight ball when disturbed, while sowbugs cannot. Both feed primarily on decaying organic matter, and while they don't bite, sting, or spread disease, their presence in large numbers is a reliable indicator of excessive moisture problems that could lead to more serious issues like mold, wood rot, or attracting other pests. Addressing the moisture issue is the key to lasting control.
Signs of Sowbugs & Pillbugs
- Finding roly-polies or flat, oval grey bugs in basements, bathrooms, or garages
- Congregations under potted plants, mulch, or landscaping stones near the foundation
- Large numbers appearing in crawl spaces or utility rooms
- Activity increases after rain or in humid conditions
- Presence of other moisture-loving pests (millipedes, earwigs, springtails)
Prevention Tips
- Reduce moisture in basements and crawl spaces with dehumidifiers
- Ensure proper drainage away from the foundation — clean gutters and extend downspouts
- Pull mulch, leaf litter, and ground cover at least 12 inches from the foundation
- Seal cracks in foundation walls, basement windows, and door thresholds
- Improve ventilation in crawl spaces and damp areas
- Remove debris piles, rotting wood, and standing water near the home
Did You Know?
- 1.Pillbugs and sowbugs are crustaceans — they're more closely related to lobsters than to insects
- 2.Pillbugs carry their eggs in a fluid-filled pouch on their underside, similar to a kangaroo
- 3.They play an important role in decomposition, breaking down dead plant material and recycling nutrients into the soil
Need Help With Sowbugs & Pillbugs?
Our general pest control service targets sowbugs & pillbugs at the source. Contact us for a free inspection and quote.
