sweden crow cigarette A project in is training crows to help clean the streets by collecting discarded butts. The system uses a machine that rewards the birds with food when they drop cigarette Sweden deploys 'easy to teach'

Sweden deploys 'easy to teach' CROWS to pick up cigarette butts on city streets Daily Mail Online Crows trained to pick up cigarette butts in Sweden YouTube Swedish Company Trains Crows to Pick Up Cigarette Butts A Swedish startup, Corvid Cleaning, is tackling litter by training wild crows to collect cigarette butts in exchange for food : r interesting Crows 'Paid' to Pick Up Cigarette Litter in Sweden Watch: Wild crows trained to clear cigarette butts from streets in Stockholm, Sweden

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