what are rolly polly bugs
About Roly Poly Bugs. Roly poly bugs are known by a variety of names, including pill bug, sow bug and potato bug. The roly poly bug gets its name from its ability to roll up into a ball if it feels threatened. The bugs have a hard gray or brown shell, called an exoskeleton, seven pairs of legs and two pairs of antennae. The dull color of their shells helps them blend into the ground and avoid being spotted by predators.