In some areas of the country, like here in Fort Gratiot, Michigan, carpenter ants cause more damage to structures than termites. It’s not hard to identify carpenter ants because of their size, they’re quite big. They range in size from 1/4 of an inch to a little over 1/2 inch with female alates (winged reproductive) being as big as 1 inch.
They are difficult insects to control and can cause extensive damage to wood in a fairly short period of time. Carpenter ants do not actually eat wood, but excavate galleries within it to use as nesting sites.