The answer to 'why is my carpenter ant droppings' is that carpenter ants leave behind sawdust-like droppings, called frass, as they tunnel through wood to build their nests. Carpenter ant frass is a sign of an active infestation and should be addressed promptly.
Carpenter ants are attracted to damp, rotting wood and often infest homes through cracks, gaps, or entry points. Their droppings indicate they are actively burrowing and expanding their nest. Left untreated, a carpenter ant colony can cause significant structural damage over time.