Family Porcellionidae is a group of crustaceans commonly known as pillbugs, sowbugs, or roly-polies. Pillbugs and sowbugs are often used interchangeably, but pillbugs have a rounder shape while sowbugs have a flatter shape. These creatures are also referred to as woodlice, armadillo bugs, and potato bugs, depending on where you live. They are known for their ability to roll into a tight ball when threatened, which gives them the nickname "roly-polies." Members of the Porcellionidae family can be found in many parts of the world, including North America, Europe, and Australia. They are important decomposers in terrestrial ecosystems and play a vital role in breaking down organic matter.