A French theme park has come up with a clever way to help clean up trash from the ground.

The park has trained six Eurasian crows to pickup cigarette butts and other trash left by messy visitors.

The theme park, Puy du Fou, located in the Vendee region of Western France is the second most popular park in the country after Disneyland Paris. It gets over two million visitors per year.

The birds have been trained to pick up the trash and put it in a small box, then they receive their payment. The New York Post writes that, “Each time they deliver a piece of trash, the box dispenses a tasty treat.”

The first group of birds have already been working at the park and the rest are set to start helping out after the weekend.

Pretty cool, right?

Find out more from the New York Post here.