crows picking up cigarettes Sweden startup is teaching to clean cigarette butts after stupid humans These birds are being recruited

These birds 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 crows carry out the task as they receive some What if keeping the streets clean could earn a reward? In Sweden, a fascinating initiative has explored training crows to collect cigarette butts and other small pieces of litter in exchange for Crows Could Be Trained To Clear Up Cigarette Butts From The Streets IFLScience Butts for nuts: can crows do our dirty work (and should they)?

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