Pillbugs get their common name from their ability to roll up into a ball when disturbed, sometimes called “roly-polies”. These land-dwelling crustaceans are arthropods but not insects.
- Color: Slate gray to black
- Legs: 7 pairs
- Shape: Oval, humpbacked in appearance
- Size: 1/4 - 5/8”
- Antennae: Yes
- Region: Throughout the U.S.
- Habits: Pillbugs and Sowbugs are scavengers and feed on decaying organic matter, but occasionally on dead animals.
- Habitat: Lacking closing devices for their respiratory system and an outer waxy layer on their exoskeleton, Pillbugs require environments with high moisture content to prevent dehydration. Their nocturnal habits reduce water loss. In the day time you can find them around building, under trash, boards, pots, piles of grass clippings, and other decaying vegetation.
- Threats: Pillbugs and Sowbugs are nuisance pests but pose no threat.