Sowbugs & Pillbugs
Armadillidium vulgare (pillbug), Porcellio laevis (sowbug)
Sowbugs and pillbugs (roly-polies) are crustaceans, not insects—they're related to shrimp and crabs. Pillbugs roll into a ball when disturbed; sowbugs cannot. Both have segmented, oval bodies with sev...
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How to Identify Sowbugs & Pillbugs
Sowbugs and pillbugs (roly-polies) are crustaceans, not insects—they're related to shrimp and crabs. Pillbugs roll into a ball when disturbed; sowbugs cannot.
Sowbugs and pillbugs (roly-polies) are crustaceans, not insects—they're related to shrimp and crabs. Pillbugs roll into a ball when disturbed; sowbugs cannot. Both have segmented, oval bodies with seven pairs of legs. They have two tail-like appendages (more visible on sowbugs).
Sowbugs & Pillbugs Behavior & Habits
Understanding how sowbugs & pillbugs behave helps prevent infestations
These creatures require moisture and die quickly in dry conditions. They eat decaying plant material and are typically found in damp areas under debris, mulch, and stones. They enter homes seeking moisture when outdoor conditions become dry.
Sowbugs & Pillbugs Risks & Dangers
What sowbugs & pillbugs can do to your health and property
Health Risks
Sowbugs and pillbugs don't bite, sting, or transmit diseases. They're completely harmless to humans and pets.
Property Damage
No damage to structures or belongings. They may occasionally damage tender plant seedlings but are primarily decomposers of dead plant material.
Signs of Sowbugs & Pillbugs Infestation
Look for these indicators in your home
Sowbugs & Pillbugs in Boise & the Treasure Valley
Sowbugs and pillbugs are extremely common in the Treasure Valley, especially in irrigated landscapes. They thrive in the moist microhabitats created by sprinkler systems and mulch. Invasions are common in basements of homes with heavy landscaping.
How We Eliminate Sowbugs & Pillbugs
Professional treatment for complete elimination
Control focuses on habitat modification and perimeter treatment. We address moisture issues, create dry barriers around foundations, treat exterior hiding places, and seal entry points. Reducing outdoor populations near the home prevents indoor invasions.
How to Prevent Sowbugs & Pillbugs
Steps you can take to reduce the risk of infestation
Sowbugs & Pillbugs Questions Answered
Common questions about identification, prevention, and treatment
Are roly-polies harmful?
No. Pillbugs (roly-polies) are completely harmless. They don't bite, spread disease, or damage property. They're actually beneficial decomposers that help break down dead plant material in gardens.
Why are they in my basement?
Sowbugs and pillbugs need constant moisture to survive. If they're in your basement, it indicates a moisture problem—either from leaks, humidity, or water seeping through foundation walls.
Are these actually bugs?
No! Sowbugs and pillbugs are crustaceans, closely related to crabs, lobsters, and shrimp. They breathe through gill-like structures, which is why they require moist environments.
Similar Pests
Learn about other pests in this category