A bird deterrence system comprising: - a laser device (100, 110, 120) for producing a laser beam; comprising scanning equipment for rotating the laser beam at designated lateral and elevational angular speeds relative to a normal axis; - a power supply for feeding the laser device (100, 110, 120); and - a control unit for controlling the laser device (100, 110, 120); and - an input module that is programmed, in a teach mode, to control rotation of the laser beam at designated lateral and elevational angles, wherein the input module further comprises an identification routine to identify said designated lateral and elevational angles as successive waypoints defining a laser scanning area; and to store the waypoints in the control unit, wherein the equipment comprises pan and tilt motors arranged to direct the device in designated lateral and elevational angles; the pan and tilt motors controlled by the control unit; and wherein the laser device is fixed to a frame constructed to be fixed relative to the laser scanning area to be scanned and defining the normal axis; rotating the laser beam at designated lateral and elevational angular speeds relative to the frame wherein the input module further comprises a routine for defining a maximum lateral angle; characterized in that the control unit is programmed to execute the steps of: - receiving successive waypoints defining a laser scanning area to be scanned by the laser beam; - defining a trajectory bounded between perimeter lines that connect successive waypoints inside the laser scanning area, the trajectory having a principal direction; - transforming the trajectory in designated elevational and lateral angles of a laser beam to be rotated; and - activating the laser beam to produce a moving spot along the trajectory for said designated elevational and lateral angles. - a laser device (100, 110, 120) for producing a laser beam; comprising scanning equipment for rotating the laser beam at designated lateral and elevational angular speeds relative to a normal axis; - a power supply for feeding the laser device (100, 110, 120); and - a control unit for controlling the laser device (100, 110, 120); and - an input module that is programmed, in a teach mode, to control rotation of the laser beam at designated lateral and elevational angles, wherein the input module further comprises an identification routine to identify said designated lateral and elevational angles as successive waypoints defining a laser scanning area; and to store the waypoints in the control unit, wherein the equipment comprises pan and tilt motors arranged to direct the device in designated lateral and elevational angles; the pan and tilt motors controlled by the control unit; and wherein the laser device is fixed to a frame constructed to be fixed relative to the laser scanning area to be scanned and defining the normal axis; rotating the laser beam at designated lateral and elevational angular speeds relative to the frame wherein the input module further comprises a routine for defining a maximum lateral angle; characterized in that the control unit is programmed to execute the steps of: - receiving successive waypoints defining a laser scanning area to be scanned by the laser beam; - defining a trajectory bounded between perimeter lines that connect successive waypoints inside the laser scanning area, the trajectory having a principal direction; - transforming the trajectory in designated elevational and lateral angles of a laser beam to be rotated; and - activating the laser beam to produce a moving spot along the trajectory for said designated elevational and lateral angles.