Pillbug

Pillbugs are sometimes called “roly-polies” and get this common name because  they roll up into a tight ball when disturbed. These land-dwelling crustaceans are arthropods but not insects. They are worldwide in distribution. In the United States, the most common species is Armadillidium vulgare (Latreille) which is in the family Armadillidiidae; it has worldwide distribution. 

Adults about ¼-5/8” (7-15 mm) long, convex above but flat or hollow beneath. Color slate gray.

Pliibugs are inactive and remain hidden under objects during the day to reduce water loss. During the day, they can be found around buildings in such places as under trash, boards, rocks, flower pots, piles of grass clippings, flower-bed mulches, and other decaying vegetation.

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