Carpenter ant

carpenter ant

Carpenter ants are large (.25 to 1 in/0.63 to 2.5 cm) ants indigenous to many parts of the world. They prefer dead, damp wood in which to build nests. They do not eat it, however, unlike termites. Sometimes carpenter ants will hollow out sections of trees. The most likely species to be infesting a house in the United States is the black carpenter ant (Camponotus pennsylvanicus). However, there are over a thousand other species in the genusCamponotus.

Symbionts

All ants in this genus, and also some related genera, possess an obligate bacterial endosymbiont calledBlochmannia. This bacterium has a small genome, and retains genes to biosynthesize essential amino acidsand other nutrients. This suggests the bacterium plays a role in ant nutrition. Many Camponotus species are also infected with Wolbachia, another endosymbiont that is widespread across insect groups.

Habitat

Carpenter ant species reside both outdoors and indoors in moist, decaying or hollow wood. They cut "galleries" into the wood grain to provide passageways for movement from section to section of the nest. Certain parts of a house, such as around and under windows, roof eaves, decks and porches, are more likely to be infested by Carpenter Ants because these areas are most vulnerable to moisture.

As pests

Carpenter ants can damage wood used in the construction of buildings. They can leave behind a sawdust-like material behind called frass that provides clues to their nesting location. Carpenter ant galleries are smooth and very different from termite-damaged areas, which have mud packed into the hollowed-out areas.

Exploding ants

In at least nine Southeast Asian species of the Cylindricus complex, including Camponotus saundersi, workers feature greatly enlargedmandibular glands that run the entire length of the ant's body. They can release their contents suicidally, rupturing the ant's body and spraying toxic substance from the head, which gives these species the common name "exploding ants." The ant has an enormously enlarged mandibular(abdomen) gland, many times the size of a normal ant, which produces the glue. The glue bursts out and entangles and immobilizes all nearby victims.

The termite species Globitermes sulphureus has a similar defensive mechanism.

 

 

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