Crows will be sent to pick up discarded cigarette butts and other forms of litter from the streets of a Swedish city.The wild birds are being trained through a step-by-step process to pick up rubbish and place it into a machine which will dispense food for them in the city of Södertälje.The method is part of a pilot project called 'Corvid Cleaning' by lower the costs of street cleaning in the city.
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