Swedish Firm Deploys Crows to Pick Up Cigarette Butts

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  • In Södertälje, Sweden, Crows are being trained to pick up cigarette butts off the street.
  • The birds are given a little bit of food for every butt they deposit in a bespoke machine.
  • New Caledonian crows may be the smartest birds for the job as they are the easiest to teach and there is also high chance of them learning from each other.

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