Abstract: A drone for deterring intruders within a monitored area includes a multirotor aerial vehicle with an electric drive apparatus and a power supply configured to provide electrical energy. A controller is configured to control the multirotor aerial vehicle. A first sensor is in electrical communication with the controller, the sensor configured to provide navigation information to the controller. A wireless communication circuit is in electrical communication with the controller, and in wireless communication with an external wireless transceiver. A deterrence effector bay is in electrical communication with the controller. The deterrence effector bay includes a non-lethal deterrence effector and an actuator. Activation of the actuator causes the delivery of the non-lethal deterrence effector to a target. The drone may be used in conjunction with an alarm system as a deterrent against intrusion.