Carpenter ants are between 6 to 25 mm in length. They build their nest by drilling tunnels in wood. The most common in Quebec is the black carpenter ant (Camponotus pennsylvanicus).
Carpenter ants infest all wood both inside and outside of houses. They dig tunnels in order to expand their nest. They prefer wet or decayed wood, their presence in a home may be caused by humidity or water infiltration.
Carpenter ants do not eat wood, they eject it out of their tunnels in the form of sawdust. It can be found in hallow trees or tree stumps, but also in the structure of a house, in window frames and doors, window ledges and balconies.