Solar Powered Bird Scarer
The solar powered bird scarer is a device to scare birds away from different locations varying from large crop fields to airports and urban areas. This scare crow device uses natural bird distress calls to drive them away from crop fields and other populated areas. The device is powered by Photovoltaic Cells, also called solar panels. These devices are portable and water proof.
The bird movements over a wide area is detected by the device using infra red sensors. Once such a disturbance in the area is detected, the device produces distress calls to drive away the flock of birds. This system is very effective, portable and is independent of any external power supplies.
Reference Url: http://www.solaruk.net/case-study/bird-Scarer.asp