Seeing flying ants in your home is never a good sign, but having these winged ants in your home in the winter is especially problematic. This is because ants only fly-or even have wings-when they are getting ready to breed. In the summer, the flying ant may be a species that lives outdoors and simply got inside through an open door or through another gap or crack.
Carpenter ants are very common across the U.S. but are often confused with termites. Some carpenter ants are much larger than termites. In fact, carpenter ants are one of the largest of all ant species! But other carpenter ants are very small, so size is not a way to determine species.
Carpenter arts are also more likely to be seen out in the open than are termites. While both carpenter ants and termites can be very destructive to homes, the two species are different because termites eat the wood in which they tunnel, but carpenter ants only nest in it and do not eat it. Another difference between carpenter ants and termites is the frass (wood dust, soil, and insect parts) that is often found beneath openings to the carpenter ants’ nest.
Whether the winged ant you see is a carpenter ant or a termite, the wings mean that the insect is a reproductive male or queen-the only members of an ant colony that can reproduce. Ants and termites swarm to mate, then the males die, having done their duty, and the queens drop their wings to find a nesting site.
Because of this, a winged ant seen indoors during the summer may just mean that it flew in from outside. It will likely die before it can find a good nesting site, and no pest control is needed for the ant. But because the ants are not active outdoors in the winter, a flying ant seen indoors at this time most likely means that the ants are nesting within the structure.
It is rare for termites to swarm at all in the winter, but they have been known to do so in warm areas of infested buildings. So the sudden appearance of swarming ants or termites in flight is one of the first signs of indoor infestation.
While carpenter ants may be found nesting in dry wood, they are more likely to be found in wood that is wet, damp, and/or rotting. The first step is to repair or replace the rotted wood to remove the harborage and help prevent future infestation.
The next step is the use of an insecticide to control and kill ants that have built their nest indoors.