Termites can be difficult to detect, but there are key warning signs to indicate the presence of termites. Hollow or damaged wood that sounds empty when tapped may indicate internal termite activity. Mud tubes on walls, foundations, or crawl spaces serve as protective tunnels for subterranean termites. Discarded wings near windows, doors, or light fixtures suggest that reproductive termites have swarmed and found a new nesting site. Small piles of termite droppings, resembling sawdust or coffee grounds, are often found near wooden structures. If any of these signs are present, immediate action is necessary to prevent extensive structural damage.