Pillbugs are back yard inhabitants around the world. They are named pillbugs due to their ability to roll into a ball like an old fashioned pill. They are close relatives of a snowbug but snow bugs are unable to roll into a ball and are a lot flatter. Pillbugs are actually part of the crustaceans family, like crabs and lobsters. Pillbugs breathe through their gills instead of lungs like most crustaceans , their gills are located underneath the opposite of their armor. You can find pillbugs near damp places due to the fact they need to keep their gills slightly wet/moist.