The use of ultrasonic waves; which human ears do not detect, but are perceived by small birds is a novel technologythat can effectively repel such birds from designated places. Ultrasonic waves was successfully generated, withautomatically varied frequency (between 15 kHz and 25 kHz), amplified and broadcast at high enough soundpressure level from a locally fabricated solar powered electronic device. The 7.98W device produced an ultrasoundof 118dB, on the average will cover a distance of 45.02m2 while the 23.98W with an ultrasound of 123dB will covera distance of 232.26m2 when placed on the elevation of 0.78m but when placed on the elevation of 1.86m, theiraverage area coverage will be 175.83m2 and 429.53m2 respectively .The ultrasonic waves created a hostileenvironment for the pest birds and had a repulsive influence on them, though they have a small radius of action buteventually drove the birds away from the designated locations. Response to the ultrasonic wave stimulusbroadcasted from the environmentally friendly gadget was visibly demonstrated by targeted weaver birds andblack birds but not quelea birds. The waves travelled farther with increasing power of the gadget and for wet daysthan for dry days. This is advantageous as rain-fed cereal crops fruit during the rainy season and will need thedeployment of the gadget more at such a period. About 5-6 pieces of the 23.98W device will be needed to cover ahectare sized field