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Sowbugs

Sowbugs and pillbugs are similar-looking pests which are more closely akin to shrimp and crayfish than to insects. They are the only crustaceans that have adapted to living their entire life on land. Sowbugs and pillbugs live in moist environments outdoors but occasionally end up in buildings.

Identification & Facts (Oniscidea)

  • Sowbugs and pillbugs range in size from 1/4 to 1/2 inch long and are dark to slate gray. Their oval, segmented bodies are convex above but flat or concave underneath. 

  • Sowbugs and pillbugs are scavengers and feed mainly on decaying organic matter. 

  • Sowbugs and pillbugs may leave their natural habitats at night, and crawl about over sidewalks, patios, and foundations. They often invade crawl spaces, damp basements and first floors of houses at ground level.

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