MTPR

Jeremy Fleege

The Vortex Ring Avian Deterrent shoots a 200 mph blast of air to keep birds away from the toxic Berkeley Pit in Butte, MT.
Nora Saks

High above the Berkeley Pit, Butte’s famous copper mine turned toxic lake, a mini drone swoops and soars, then catches a thermal and floats. With its dark wings and yellow beak, it could easily be mistaken for a bird of prey. Just a few minutes after take off, it is.

“Oh, here comes somebody … bald eagle …"