'Intelligent' crows to pick up litter at French theme park

Six crows specially trained to pick up cigarette ends and rubbish will be put to work next week at a French historical theme park, its president said on Friday. "The goal is not just to clear up, because the visitors are generally careful to keep things clean" but also to show that "nature itself can teach us to take care of the environment", Nicolas de Villiers of the Puy du Fou park, in the western Vendee region, told AFP. -- More...