GooseBuster from Bird-X is the only unit to use actual alert and alarm calls of Canada geese recorded in the wild. Geese recognize them and respond instinctively. Sound combinations, sequences and speaker selection change randomly, causing geese to perceive multiple birds in motion in several locations. Dr. Philip Whitford has been researching Canada geese behavior and vocal communication since 1979. GooseBuster is proven effective in university studies. Avoid unsightly mess and contamination from droppings and money spent on fixing the ravaged property. Covers up to 21 acres with two units or up to seven acres with one unit. GatorGuard is life-sized floating alligator head scares geese and small animals from ponds. It moves and bounces with the wind and the mirrored eyes reflect the sun so birds think this predator is watching their every move. GatorGuard works in all geographic areas because the pest birds have instinctive fear, not necessarily experienced fear. The pests recognize predator-like patterns and flee. GatorGuard is made of UV-treated urethane foam and includes an eye-hook for anchoring.