High rainfall or drought may cause these pests to enter structures in large numbers. Millipedes can reach large numbers in thick mulch around foundation plantings and in grass clippings kept shaded and moist. They are long cylindrical worm-like animals, brown to blackish brown in color. Full-grown millipedes range in size from half an inch to several inches. They move slowly and roll up in a circle when disturbed.
Millipedes are dark brown, worm-like creatures with two pairs of legs per body segment.
They will curl up tightly when touched or handled. Millipedes feed on decaying vegetable matter and on small roots and green leaves that may be on the ground. Potatoes and other vegetables being stored on the floor may also provide food. Millipedes will not attack clothes, fabrics or dry stored foods. During the fall and occasionally during the summer, millipedes leave the soil and crawl into homes.