Nick Upton / Southern pill woodlouse (Armadillidium depressum) on an old garden wall at night, Wiltshire, UK, September.

Nick Upton / Two Southern pill woodlice (Armadillidium depressum) on an old garden wall at night, Wiltshire, UK, September.

Nick Upton / Southern pill woodlouse (Armadillidium depressum) on an old garden wall at night, Wiltshire, UK, September.

MYN / Dirk Funhoff / Woodlouse (Armadillidium vulgare) upside down, Staudernheim, Germany. Meetyourneighbours.net project.

MYN / Dirk Funhoff / Woodlouse (Armadillidium vulgare) shpwing underside, Staudernheim, Germany. Meetyourneighbours.net project.

MYN / Dirk Funhoff / Woodlouse (Armadillidium vulgare), Staudernheim, Pfalz, Germany. September. Meetyourneighbours.net project

Solvin Zankl / Woodlouse (Armadillidium pulchellum) Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, December.

Pascal Pittorino / Woodlouse (Armadillium vulgare) on wood, Var, Provence, France, July.

MYN / Eduardo Blanco / Woodlouse (Armadillidium sp), Corella, Navarra, Spain, April. meetyourneighbours.net project

Stephen Dalton / Close up of a pill woodlouse (Armadillidium vulgare) curled up, UK.

MYN / Marc Pihet / Pill woodlouse (Armadillidium vulgare) Maine-et-Loire, France, August, meetyourneighbours.net project

Joel Sartore / Photo Ark / Nosy pill woodlouse (Armadillidium nasatum) portrait, Omaha's Henry Doorly Zoo & Aquarium, USA. Captive.