More than twenty years ago the founder of Bird Gard, my father, developed and refined a complete line of electronic pest control products for industrial and residential use. His focus was always on extensive research into safe and humane ways to repel nuisance pests while having minimal adverse effects on the environment.
In collaboration with leading universities and agriculture extension agents doing research into animal behavior, a method was discovered of using the highly developed social structure of animals to control their behavior.
Most nuisance birds live in flocks, an interdependent social order where each bird acts as the eyes and ears of the group. When one senses danger or a food source, the information is immediately relayed to the rest of the flock. This explains why we see huge flocks of birds suddenly change direction en masse, as if being directed by an outside force.