Solvin Zankl / Woodlouse expert Christian Schmidt with a Woodlouse (Porcellio scaber) held in a pair of tweezers. Germany, June 2009

Kim Taylor / Common rough woodlouse (Porcellio scaber) group sheltering in a crevice under tree bark, Surrey, England

MYN / Paul van Hoof / Common rough woodlouse (Porcellio scaber) adult, The Netherlands, September. Meetyourneighbours.net project

MYN / Paul van Hoof / Common rough woodlouse (Porcellio scaber) adult, The Netherlands, September. Meetyourneighbours.net project

Will Watson / Aggregation of Common Rough Woodlice (Porcellio scaber) in various colour forms, Shropshire, England. June.

Albert Lleal / Woodlouse (Porcellio expansus), Serra de Prades Mountains, Catalonia, Spain

MYN / Dimitris Poursanidis / Smooth slater (Porcellio laevis) Heraklion, Crete, Greece, March meetyourneighbours.net project

MYN / Dimitris Poursanidis / Smooth slater (Porcellio laevis) Heraklion, Crete, Greece, March meetyourneighbours.net project

MYN / Dimitris Poursanidis / Smooth slater (Porcellio laevis) with half of body covered with the new exoskeleton after the ecdysis, Heraklion, Crete, Greece, March meetyourneighbours.net project

MYN / Dimitris Poursanidis / Smooth slater (Porcellio laevis), WITH half body covered with the new exoskeleton after the ecdysis, Heraklion, Crete, Greece, March meetyourneighbours.net project

MYN / Dimitris Poursanidis / Smooth slater (Porcellio laevis) Heraklion, Crete, Greece, March meetyourneighbours.net project

Rod Williams / Common Rough Woodlice (Porcellio scaber) Lewisham, London, August

Alex Hyde / Common Woodlouse (Porcellio scaber) on decaying wood. Derbyshire, UK. October.

Stephen Dalton / Common woodlouse (Porcello scaber)

Stephen Dalton / Common woodlouse (Porcellio scaber) close up of head, UK

Stephen Dalton / Common woodlouse (Porcello scaber)

Stephen Dalton / Common woodlouse (Porcellio scaber) portrait, UK

Russell Cooper / Common woodlouse (Porcellio scaber) on moss, UK

Dan Burton / Woodlice (Porcellio scaber) with young, UK

Kim Taylor / Common woodlouse {Porcellio scaber} beneath bark of rotten tree, UK.

Dan Burton / Common woodlouse under log {Porcellio scaber} UK.

Warwick Sloss / Close up of rear pinchers of Common woodlice {Porcellio scaber} UK

Warwick Sloss / Common woodlouse on wood. {Porcellio scaber} Europe

Joel Sartore / Photo Ark / Painted woodlouse (Porcellio spinicornis) portrait, Josh's Frogs, Michigan, USA. Captive.

Joel Sartore / Photo Ark / Dairy cow isopod (Porcellio laevis) dorsal view, portrait, Josh'sFrogs. Captive.

Joel Sartore / Photo Ark / Painted woodlouse (Porcellio spinicornis) dorsal view, portrait, Josh'sFrogs. Captive.

Joel Sartore / Photo Ark / Two Painted woodlice (Porcellio spinicornis) portrait, Josh'sFrogs. Captive.

Joel Sartore / Photo Ark / Sevilla isopod (Porcellio sp.) dorsal view, portrait, Josh'sFrogs. Captive.

Joel Sartore / Photo Ark / Sevilla isopod (Porcellio sp.) dorsal view, portrait, Josh'sFrogs. Captive.

Joel Sartore / Photo Ark / Dark spot isopod (Porcellio ornatus) dorsal view, portrait, Josh'sFrogs. Captive.

Joel Sartore / Photo Ark / Dark spot isopod (Porcellio ornatus) dorsal view, portrait, Josh'sFrogs. Captive.

Joel Sartore / Photo Ark / Giant canyon isopod (Porcellio dilatatus) dorsal view portrait, Josh'sFrogs. Captive.

Joel Sartore / Photo Ark / Giant canyon isopod (Porcellio dilatatus) dorsal view portrait, Josh'sFrogs. Captive.

Chris Mattison / Common rough woodlouse (Porcellio scaber,) non-typical colour form, Monmouthshire, Wales, UK.

Chris Mattison / Rough woodlouse (Porcellio scaber) on moss, Derbyshire, UK, July, 2009.