The red carpenter ant and the black carpenter ant are two of the most common types in Canada. The former has a dark brownish-black body with a reddish-brown upper body. The latter is dark brownish-black all over.
Carpenter ants range in length from 6 mm to 25 mm (0.24 inch to 1 inch). A carpenter ant's body is divided into three segments, with a very slim waist separating the upper body and lower body. Their antennae are bent and in sections. Male and female adults have wings at mating time.