A French theme park has come up with a novel way to combat litterbugs: Puy du Fou park in western France recently trained six rooks (members of the crow family) to pick trash up from the ground. These birds are well-suited for the task, as they’re highly intelligent, can solve puzzles, and often use stones and twigs as tools in the wild. Four days a week, the feathered crew—named Boubou, Bamboo, Bill, Black, Bricole, and Baco—grabs small pieces of garbage in their black beaks and deposits them in a designated box in exchange for food. They won’t replace the human cleaning staff, but officials hope to send a message to visitors, according to Nicolas de Villiers, Puy du Fou’s president. “The purpose of the crows . . . ” he told NPR, “is to educate people, to open their minds, to think, ‘OK, the birds are able to do something that we are more able to do, so we should do this by ourselves.’ ”