CITC keeps the birds away
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Crawford has modified a haze machine and come up with a grape concentrate-based solution that irritates birds without permanently harming them. When birds breathe in the substance, they cough and feel irritated, and keep away from the area. However, the solution does not affect other animals or people, says Crawford, who famously worked on effects for Steven Spielberg's E.T.
The Guardian Birdhaze machine emits a transparent, nearly invisible, haze that lingers in the air for up to four hours in an enclosed area. Outside, it spreads out over an area quickly, but remains effective. Tests in places where birds or