How come woodlouse can't get up off their back?

Woodlice, or pillbugs, have a rigid exoskeleton that limits their flexibility, making it difficult for them to right themselves if they end up on their backs. Their legs are adapted for crawling, but the position they find themselves in can hinder their ability to regain an upright stance. Additionally, their body shape and weight distribution can make it challenging for them to flip over without sufficient leverage. As a result, if they are flipped onto their backs, they often struggle to return to their normal position.