Ants have a wide variety of nesting habits and food preferences. Some ants build nests in soil, producing characteristic mounds, while others nest in buildings behind moldings, baseboards, countertops and similar places. Ants may also nest in decaying or moisture damaged wood. Ants feed on many different types of foods including starches, meats, fats and sweets. Many ants take on nourishment from honeydew, a sweet liquid produced by aphids and scale insects. Common ant infestations include pavement ants, pharaoh ants, carpenter ants and odorous house ants.