The Common woodlouse is not an insect, it is part of crustaceans like lobsters. Oval in shape, it measures between 11 to 16 mm long and has 7 pairs of legs. The males are steel gray, the females more or less mottled and they are paler below.
The Common woodlouse generally feeds on dead and/or decaying plant matter.
Common woodlouse prefers dark and humid places. Outside they are found under stones, pieces of wood, in the litter, in the soil of the gardens and under various objects placed on the wet ground.
The female lays between 24 and 80 eggs per litter and can have between 1 and 3 litters per year. She will lay these eggs in an incubator pouch, or marsupium, located under her chest where the young will hatch and live there for almost 44 days before leaving.