Armadillidiidae, commonly known as pill bugs or roly-polies, are small crustaceans that belong to the order Isopoda. They are typically found in moist environments, such as under rocks, logs, or leaf litter. Unlike insects, pill bugs have a segmented body and can roll into a ball as a defense mechanism against predators. These creatures are primarily detritivores, feeding on decaying organic matter, which helps in nutrient recycling in ecosystems. Pill bugs have a hard exoskeleton and can be recognized by their oval shape and multiple legs. They are often found in gardens and are harmless to plants and humans.