Bug Identifier
Pill bug (also commonly called Roly-poly, Woodlouse, or Potato bug)
Community identification

Pill bug (also commonly called Roly-poly, Woodlouse, or Potato bug)

Armadillidium vulgare

Order & Family
Order: Isopoda; Family: Armadillidiidae
Size
Typically 8 to 18 mm (approx. 0.3 to 0.7 inches) in length.
See this bug in the Encyclopedia

Natural Habitat

Damp, dark places such as under logs, rocks, leaf litter, and in gardens/basements. They are land-dwelling crustaceans that require moisture to breathe through gill-like structures.

Diet & Feeding

Mostly detritivorous, feeding on decaying organic matter, rotting wood, and damp leaves. They occasionally eat young plants or seedlings.

Behavior Patterns

They are nocturnal and known for 'conglobation'—the ability to roll into a tight ball when threatened or to prevent moisture loss. They are slow-moving and often found in groups.

Risks & Benefits

They pose no risk to humans as they do not bite or sting. They are beneficial to the ecosystem as decomposers, recycling nutrients into the soil and helping to remove heavy metals from contaminated earth.