crows cigarette butts Swedish Company Trains to Pick Up Wild crows trained to pick

Wild crows trained to pick up cigarette butts in Swedish street cleaning project Crows Trained to Pick Up Cigarette Butts by Swedish Startup Crows trained to clean up cigarette butts in Sweden Reuters Trading Bird Food For Cigarette Butts Hackaday A machine that trades food for litter : r Amazing These birds are being recruited to pick up discarded cigarette butts from the streets and squares of a Swedish city as part of a cost cutting drive., The crows carry out the task as they receive some

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