A device to repel and disperse waterfowl entering a proscribed area consists of a laser beam generator generating a laser beam, and a photoelectric switch is provided so that the inventive device is only activated from dusk to dawn. A motion sensor senses the presence of waterfowl and activates the light beam source that is aimed into the area. In the preferred embodiment, a timer is provided that may be set for a desired duration. When the desired duration has elapsed, the controller deactivates the light beam source. The light beam source may consist of a single laser beam or a multiplicity of laser beams shining into the protected area. In one preferred embodiment of the present invention, a single laser beam is split into a plurality or multiplicity of beams using a suitable beam splitter. The inventive device may be equipped with a system that enables one or more laser beams to sweep and oscillate through the protected area so that not only is full coverage of the area assured, but the elevation of the beams is at least, at some points in time, at the level of the eyes of the waterfowl so that the waterfowl can detect the presence of the laser beams and quickly flee the area.