What do roly-poly bugs eat?

According to the University of Arizona, isopods are omnivorous scavengers that eat dead or decaying plant and animal matter. Some also eat live plants. Isopods are crustaceans featuring a rigid, jointed exoskeleton, prominent antennae and seven pairs of legs.

Isopods breathe through gills and must live in an environment that contains a significant amount of moisture, such as under logs, potted plants and moist leaves. They are minimally beneficial to soil but can be a pest to plants in large numbers. Immature isopods closely resemble adults and undergo four or five molting stages before maturation. Some species of isopod roll into a ball when threatened.