sweden crow cigarette Wild crows trained to pick up butts in Swedish street cleaning project Wild crows in sweden trained

Wild crows in sweden trained themselves to exchange cigarette butts for food, using machine deisgned YouTube Wild crows collect cigarette butts in Sweden for food rewards Crows 'Paid' to Pick Up Cigarette Litter in Sweden Butts for nuts: can crows do our dirty work (and should they)? In Sweden They Train Birds to Remove Cigarette Butts! YouTube Wild crows in Sweden are helping keep public spaces clean by doing something remarkable. Using their advanced problem solving skills, the birds have learned to drop cigarette butts into a special machine that

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