The FAA aren’t the only ones taking issue with drones, with new research suggesting unmanned aerial vehicles are stressing out animals more than previously believed. The study, carried out in Minnesota, found that repeated UAV flights overhead left black bears in an agitated state, something which had been missed as the animals froze when the drones were nearby.

To measure the actual impact of the UAVs passing the bears’ territory, Mark Ditmer – a postdoctoral researcher in the Department of Fisheries, Wildlife, and Conservation Biology at the University of Minnesota – fitted four bears with GPS collars and heart-rate monitors.
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