Little round excrements are obvious mark of termite infestation.
But actually we are going to describe drywood termite frass. Only these types of wood-eating insects kick fecals out of their nests.
Piles of little balls, larger than sand are always present in houses with termite infestation. But hardly every house owner knows how to distinguish drywood frass from sawdust or even soil. More often, people just sweep the floor and throw this vitally important sign out. Meanwhile, awareness about the excrements can help them to avoid huge wastes as termite poop appears on the early stage of infestation.