Termite droppings, called frass, are a definite sign of termite activity. They look like tiny sawdust or coffee grounds and are usually found near where termites enter or infest. Termites use these droppings to build their nests and tunnels, indicating an ongoing problem. It's essential to act quickly to prevent potential damage to wooden structures. Regular inspections in areas prone to termites help catch these droppings early for timely intervention and protection.