sweden crow cigarette Wild crows collect butts in for food rewards The Guardian – Crows are

The Guardian Crows are being recruited to pick up discarded cigarette butts from the streets and squares of a Swedish city as part of a cost cutting drive. The wild birds carry In Sweden, a surprising idea is turning crows into allies in keeping cities clean. Instead of hiring crews to pick up cigarette butts, one of the most common types of litter, a Watch: Wild crows trained to clear cigarette butts from streets in Stockholm, Sweden 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 Crows Trained to Pick Up Cigarette Butts by Swedish Startup

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