Rats and mice are the most abundant and therefore the more annoying and destructive of all rodents the homeowner or business owner may encounter. Throughout history, they have been responsible for more human illnesses and deaths than any other mammals. The most common are the Norway Rat, the Roof Rat and the House Mouse.
The signs of a rat or mouse infestation include droppings, tracks in the moist earth or dusty places, and burrows in the ground. There will be signs of gnawing and runways in the grass or through trash. You also can smell the presence of rats and mice, especially in a poorly ventilated room.