Carpenter Ants get their name from their hollowing out galleries in wood as nests. they can do serious damage to buildings when they cut extensive galleries in structural wood.

The first sign of an infestation may be seeing several sizes of worker ants crawling along a counter top or small piles of ragged "saw dust" mixed with dirt particles, fragments of insulation, and insect body parts. Each pile of debris is usually directly below a small hole in some wooden part of a cabinet, window sill or structural part of the building.

Another common sign, most often seen in Spring, is a swarm of winged reproductives emerging.

A mature colony may include 3,000 to 20,000 ants (depending on the species) and will be two to five years old before they produce their first swarm.
It usually requires a trained professional to detect the tell-tale signs of typical Carpenter Ant debris, gallery openings, forging trails, or typical gallery cutting sounds.
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Winged Ant