crows collecting cigarettes trained to clean up cigarette butts on Swedish streets A Swedish company has been

A Swedish company has been training crows to pick up cigarette butts in an effort to reduce the cost of cleaning litter off the streets in Sdertlje, near Stockholm., Corvid Cleaning has developed a Sweden deploys 'easy to teach' CROWS to pick up cigarette butts on city streets Daily Mail Online Wild crows in sweden trained themselves to exchange cigarette butts for food, using machine deisgned YouTube Unbox Sweden has begun training wild crows to collect litter especially cigarette butts in exchange for food rewards. A special machine recognizes when a crow drops a piece of

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