Bird-dispersal methods are going more and more eco-friendly and hi-tech nowadays. Adding the facet of solar power to them, Scarecrow Bio-Acoustic Systems introduces COMPACT – the solar-powered scarecrow — and it seems to be the greenest method to keep those menacing creatures away. The manufacturer ensures that it’s not life-threatening and is perfectly humane and innocuous. Rather, it works like a foghorn sending distressing calls to dispirit birds flying close to a farm.

Though it’s fully powered by solar panels, the contraption may also be powered with 15V DC, 110V/250V AC mains supplies when the sun plays foul.