crows cigarette butts Sweden uses to pick up Sweden startup is teaching crows

Sweden startup is teaching crows to clean up cigarette butts after stupid humans Can Animals Be Trained to Become City Cleaners? Pop Up City Crows to help clean up cigarette butts in Sweden Crows trained to clean up cigarette butts in Sweden Reuters Crowbars: Vending Machines Reward Crows for Cleaning Up Cigarette Butts Urbanist In Sweden, an innovative project has demonstrated how intelligent birds can help tackle urban litter. Researchers and a startup called Corvid Cleaning trained wild crows to collect cigarette butts from the streets

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