crows picking up cigarettes trained to clean cigarette butts on Swedish streets Wild crows trained to pick

Wild crows trained to pick up cigarette butts in Swedish street cleaning project South China Morning Post Sweden startup is teaching crows to clean up cigarette butts after stupid humans Unbox Sweden has begun training wild crows to collect litter especially cigarette butts in exchange for food rewards. A special machine recognizes when a crow drops a piece of Crows take a cigarette break Wild crows trained to pick up cigarette butts in Swedish street cleaning project Swedish Company Trains Crows to Clean Up Cigarette Butts EcoWatch

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