sweden crow cigarette The Guardian – Crows are being recruited to pick up discarded butts from the streets and squares of a Swedish city as part of a cost-cutting drive. The wild birds carry A machine that trades food

A machine that trades food for litter : r Amazing Wild crows in sweden trained themselves to exchange cigarette butts for food, using machine deisgned YouTube 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 A Swedish startup, Corvid Cleaning, is tackling litter by training wild crows to collect cigarette butts in exchange for food : r interesting Swedish Company Trains Crows to Pick Up Cigarette Butts

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