I wonder if something like the Blender Defender (http://www.plasma2002.com/blenderdefender http://www.plasma2002.com/blenderdefender) would be more effective th

I wonder if something like the Blender Defender (http://www.plasma2002.com/blenderdefender http://www.plasma2002.com/blenderdefender) would be more effective than the water. A strobe light and/or a rattle to frighten it off. Ultrasonic would be good as well if there was decent evidence it worked.