These small shrimp-like animals are related to the tiny shrimp that may be found by turning over piles of vegetation on ocean beaches. They occasionally are found living in very damp habitats in vegetation around structures, and when caused to move due to changes in their living conditions can invade structures in large numbers. Their cuticle lacks a waterproof, waxy layer, and thus they are susceptible not only to drying out but also to drowning if too much water is encountered.
Over-watering of landscape is the chief reason these harmless animals become structural invaders, although rainfall also may drive them to migrate. Proper maintenance of landscape moisture along with elimination of unnecessary materials on the soil will reduce the populations.