Carpenter ants are capable of causing significant economic damage to structures, utility poles, and trees. They tunnel through wood and insulation to form cavities where nests are formed. Multiple nest sites may be found on a single property. Carpenter ants do not feed on wood. They consume carbohydrates in the form of honeydew and feed on various arthropods for protein. In structures, the ants feed on a wide variety of foods. Carpenter ants are most active at night.