sweden crow cigarette Wild crows collect butts in for food rewards Crows trained to clean up

Crows trained to clean up cigarette butts in Sweden Reuters Swedens Corvid Cleaning tested an ingenious vending machine that trained wild crows to clean up streets! , When crows dropped discarded cigarette butts into the device, it scanned the litter and In Sweden, a startup tested a smart but unusual idea: rewarding wild crows with food for picking up cigarette butts. The birds drop the waste into a special machine and receive a Swedish Company Trains Crows to Pick Up Cigarette Butts

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