These large black ants may do structural damage to your home and should not be ignored. The main colony must have a constant source of moisture to survive. The main colony may establish satellite colonies that are the primary source of ant activity inside homes.
These satellite colonies set up trails between the main colony and the satellite colonies. Carpenter ants can most easily be seen along these trails at night when the ants are most active. Carpenter ants feed on a wide variety of foods, especially other insects. In the spring, mature colonies produce winged reproductive ants, that fly out to start new colonies. These flying ants often occur from satellite colonies within homes, so a homeowner may see large flying ants in their home.