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Butte: On a recent afternoon, Ian Fairweather, president of Fairweather IT, remotely navigated a drone from his company toward an exhausted snow goose that had recently landed on the Berkeley Pit. But the snow goose resisted the attempts to be hazed from the toxic, artificial lake, swimming away but refusing to take flight. Instead, one of Fairweather’s colleagues sent another high-tech bird-hazing device into the pit: a little remote-controlled fan boat equipped with a camera and nicknamed the Waterdog. Builders hope it can be used not only to move birds off the pit water but also to retrieve those that die, as a waterdog would.