Sowbugs are dark grey in color and ¼ to 5/8 inch long. These humpbacked, oval crustaceans appear to be covered with segmented armour. Pillbugs can be distinguished from sowbugs because pillbugs are able to roll up into a ball when alarmed.
Armadillidum vulgare Porcellio laevis Koch
Female pillbugs and sowbugs carry their eggs in a brood pouch where the young hatch in about 45 days. There are 24-28 eggs in each brood; and one to three broods are produced each year.