At 9:45 every morning at the Vergenoegd Wine Estate in Stellenbosch, South Africa, a giant herd of ducks is released. About 700-800 Indian Runner ducks are employed at the vineyard, and their job is simple: keep the grapevines free of pests. These ducks are released en masse, running across the vineyard's grounds in formation "like they've worked on the choreography beforehand," as NPR puts it.
The birds are tall enough to grab slugs and snails from higher on the plants, and they're skinny enough to fit through the vines, making them uniquely qualified for pest control. The ducks get something out of it too, of course—they get to gorge on duck delicacies all day. Luckily for visitors to the vineyard, they can watch the delightful parade of ducks twice a day.