Pest guide
Carpenter Ants
Large black or red-and-black ants that hollow out damp or damaged wood to nest. They don't eat wood but can weaken it.
Signs you have them
Large ants indoors in spring; piles of fine sawdust; rustling sounds in walls; winged ants inside.
How to keep them out
Trim branches touching the roof; fix moisture problems; replace rotted wood; keep firewood away from the house.