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Ants:     Argentine Ant   |   Carpenter Ant   |   Harvester Ant   |   Pharaoh Ant   |   Red Imported Fire Ant   |   Thief Ant

Carpenter Ant

  Common name: Latin name: Class: Order: Family:
  Carpenter Ant Camponotus spp. Insecta Hymenoptera Formicidae
  Size:
  Workers vary between 1/8-1/2 inch long and queen may be up to 5/8 inch long.
  Color:
  Common western species is dull black with reddish legs and golden hairs covering the abdomen. Other species are black, a combination of red and black, or completely red or brown.
  Where Found:
  Many species are native to North America and are found throughout the United States.  
  Habitat:
  Hollowed out spaces in wood used as nests. Nests first made in decayed wood and then enlarged into sound wood. Indoors: nests are in wood (perhaps softened by fungus/ rot), insulation, wall voids. Outdoors: nests are in old firewood, rotting fence posts, stumps, dead portions of living trees, under stones and logs. A colony has a main nest connected to satellite nests by a cleared trail about 1/4 inch wide.
  Food:
  These ants do not eat wood. They live within it. Outdoors, they consume plant juices, insects, honeydew produced by insects,and spiders. If they are foraging indoors, they can consume sweets, grease, meat,and eggs. They can follow a regular trail when foraging or can appear solitary foagers, appearing on your kitchen counter individually.
  Biology:
  A mature colony may have 10,000-20,000 workers, with large colonies having up to 100,000, and usually only one functional, wingless queen per colony. Development from egg to adult takes at least 60 days. Swarmers aren't produced until colony matures. In the West, swarmers may appear between February and June.
  Damage:
  Weakened structures by hollowing of wood for nests. They are capable of inflicting painful bites, but that is a rare occurance.
  Invasion:
  Enter structures through doors, windows, pipes, utility wires, and branches of trees or shrubs that touch the structure. 
  Control:
  Inspection is important as this species of ant commonly nests in hollow voids such as interior of walls, hollow-core doors and various void areas in attics or sub-areas. Listening devices can be helpful in locating the nest(s). Small piles of wood shavings mixed with insect parts or insulation can mark nesting locations. Many times an interior nest is a satellite of the original colony located outside. Watch for foraging trails outside, which are most active at night. Be alert to the emergence of swarmers that are common in mating season- February through June. Check attics, basements, and crawl spaces. These ants can also enter structures on wires and pipes. Locate high moisture areas (a moisture meter can be useful). Once nests are located, appropriate treatments with aerosol or dust formulations can be made. Depending on location of infestation, preparation may be necessary. Parent colony must be located and destroyed by removing or treating directly with an appropriate registered pesticide, which may also require drilling into wood or wall voids. Use preventative measures, such as: barrier treatment with registered pesticides, pruning of plants near buildings, caulking of gaps on the structure, and treating the lowest 3-6 feet of tree trunks and utility poles. Contacting the insects with the material is essential to control. When using any pesticide, be sure it is registered for the target pest/location. Read the entire label prior to use. Follow all label directions, restrictions, and precautions.