crows picking up cigarettes trained to clean cigarette butts in Sweden Crows help to clean up

Crows help to clean up cigarette butts in several countries Crows Trained to Pick Up Cigarette Butts by Swedish Startup Butts for nuts: can crows do our dirty work (and should they)? Clever Crows Are Now Picking Up Cigarette Butts And Quietly Saving Millions in Cleaning Costs 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 A Swedish startup, Corvid Cleaning, is tackling litter by training wild crows to collect cigarette butts in exchange for food : r interesting

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