Roly poly / Pill bug / Potato bug Classification: A terrestrial crustacean, not an insect. Defense: Rolls into a tight ball, which is where its common name "roly poly" comes from. Appearance: Oval-shaped with seven pairs of legs and seven pairs of hardened plates on its back. Diet: Primarily feeds on decaying organic matter like rotting logs and leaves. Habitat: Damp, dark environments, under rocks, logs, or leaf litter. milkyymediaMINISCULES MILKYY MEDIA