Test Results

Testing of the Birdavert System was conducted in accordance with carefully prepared protocol approved by the U.S. Fish & Wildlife Service (USFWS) prior to the installation of the system on a 45-acre flue gas desulfurization (FGD) pond. Data were collected by field observers trained in waterfowl identification and research techniques by the USFWS and Dr. Clayton White, noted professor of Ornithology at Brigham Young University. These data were analyzed by an independent third party, Dr. Perry Hardin, also a professor at Brigham Young University, who has considerable expertise in experimental design and statistical methods and analysis.

During the first two research intervals, which were designed to correspond to fall and spring waterfowl migrations, the system was tested using 48-hour on and off periods. A total of 163 ducks and geese landed on the pond, of which only five (3%) landed while the system was activated. A one-tailed difference of the means test reveals that the 96.9% reduction is significant beyond the 0.05 level stipulated in the research protocol.

During the 1994 fall migration period. the system ran continuously. Thirty thousand birds were counted on the eight ponds (five of which were constructed during the summer of 1994) within the immediate geographic area (a 1/2-mile radius) of the protected pond. Of the 30,000 birds, 45 birds were observed on the protected pond. The protected pond represents 16.5% of the total water surface area of the eight available ponds. Using the chi-square test method of observed versus expected rates, it would be expected that random landings would result in a total of 4,950 birds on the protected pond. The 45 actual landings thus represent less than I% of the expected Landings on the protected pond. This is statistically significant at the 0.01 level, substantially below the 0.05 level required by the U.S. Fish & Wildlife Service-approved research protocol.


The Birdavert System has demonstrated its ability to deter birds from landing in sensitive areas protected by the System. The system is designed to function equally well on ponds considerably larger than the test pond. Cost per acre is much lower than the cost of other deterrents, and is projected to decrease as the size of the protected pond surface increases.