COMMON NAME: Carpenter Ant
SCIENTIFIC NAME: Order Hymenoptera, family Formicidae, Camponotus spp.
SIZE: Adult--1/4 to 1/2"
IDENTIFICATION: Large compared with other ants. Black, reddish brown, or yellowish. May be winged or wingless. Only males and queens have wings. Workers are large infertile females. Thorax in profile is evenly rounded on top. Circle of tiny hairs on the rear end. Red head and thorax, black abdomen.
BIOLOGY AND LIFE CYCLE: Larvae chew and bore into moist, decaying, rotting stumps or logs to form large galleries. Will also infest dry structured wood indoors. Odorous when crushed due to formic acid. Swarms from May to late July. Ant wings seem to function only to disperse the new colonies and prevent close inbreeding. Complete metamorphosis, like all ants. They are mostly nocturnal.
HABITAT: Nests of excavated galleries in unsound or moist wood.
FEEDING HABITS: Dead and live insects, plant sap, honeydew from other insects, pollen, seed.
ECONOMIC IMPORTANCE: Wood and structural damage; help to break down organic matter.
NATURAL CONTROL: Beneficial nematodes, birds, and lizards.
ORGANIC CONTROL: Organic control: Boric acid products indoors; plant oil products, diatomaceous earth, beneficial nematodes. Acrobat ants and odorous ants are controlled with the same techniques.
INSIGHT: May give you a threatening bite but does not hurt. They do not sting. About the only way to find them is to listen to the walls at night. Where discovered, drill a small hole and dust pyrethrum or boric acid into the wall to kill them. Ants are said to be the most abundant terrestrial animals.
Wood eating ants that can be controlled with boric acid wood treatments or dusting indoors. Wall cavities can be treated with a mix of 90% natural diatomaceous earth and 10% boric acid.
DO NOT USE BORIC ACID OUTDOORS. IT CAN CREATE SOIL TOXICITY IN A HURRY.