Found in cool, damp ground cover. Normally found outdoors in damp places, but can migrate into basements and first floor rooms. Like damp places. Frequently invade damp basements, crawl spaces and potted plants. Pillbug rolls into a ball when disturbed.
Most species hide in cracks, dark areas or webs.
May bite if disturbed. Black Widow and Brown Recluse species are poisonous. Found on pets, near pet areas and in carpet. Can cause irritating bites.