Abstract: Because of their remarkable ability to survive and multiply, methods of rat removal based on killing rats have been futile. The novel systems and methods depend on the vocalization of rats to cause rats to fire a premises. A large box trap is designed to attract several rats from a pack foraging together, wherein a spring loaded door is closed when a trigger bait is disturbed. The trap is equipped with electrical circuitry including a platen which is constrained to move up and down between the floor and the top of the trap compartment. The platen has a large number of sharp needles projecting downward therefrom. A stimulating electrical voltage is applied between the needles and the metal floor of the trap, which is selected to be effective to evoke the distress and warning calls of the rats. After a suitable interval the rats in the trap are killed by an increase applied voltage, the 115 volts of ordinary house current.