What a useful question! it’s better to put rat traps in places where rats, their feces or damage signs have been seen.  Do you know that the place of rats’  habitat may depend on their species?  Usually brown rats prefer to live in walls, in the kitchen, basement, your car or trash cans whereas black rats are interested in higher places such as attic and roof. You need to apply only the best rat trap in order to get rid of rats in your house and outdoors – find them in our review of the best rat traps.