HABITAT/WOOD PREFERENCE Spider beetles are primarily scavengers with many species feeding on both plant and animal origin materials. They feed on grain products, seeds, dried fruits, meats, fish meal, wool, hair, feathers, skins, drugs, roots, rodent droppings, insect and other animal carcasses, and plant and museum specimens. Besides being founds in human food, warehouses, food-handling establishments, granaries, mills, museums, and homes, they are also found in the nests of bees, wasps, birds, mammals and in vat caves and on dry carrion. BIOLOGY AND BEHAVIOR Relatively few eggs, maybe up to 100 but often fewer, are laid in, on or near larval food material. Many species are active only at night, hiding in cracks, crevices, and voids during daylight. Some can fly, others cannot. DISTRIBUTION Worldwide but are more common in temperate regions, which includes the U.S.