sweden crow cigarette Crows trained to clean up butts in Watch: Wild crows trained to

Watch: Wild crows trained to clear cigarette butts from streets in Stockholm, Sweden A project in Sweden is training crows to help clean the streets by collecting discarded cigarette butts. The system uses a machine that rewards the birds with food when they drop cigarette Crows Trained to Pick Up Cigarette Butts by Swedish Startup Wild crows in sweden trained themselves to exchange cigarette butts for food, using machine deisgned YouTube Swedish Company Trains Crows to Pick Up Cigarette Butts

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