What are the signs of infestation of the different kinds of pest?

Any room in a house can have signs of pest infestation including droppings. Mice and rats can leave gnawed packaging. Holes and sawdust can be signs of termites, mice or carpenter ants. Dead bugs in window sills is another sign there could be a problem. Outside ant hills and wasp nests are signs there may be infestations of ants and wasps.