You aren’t seeing things—these cows have eyes on their behinds! Cattle herders in Botswana, a country in southern Africa, had a problem: Large predators, like lions, kept attacking their livestock. But they didn’t want to kill these predators, as many of them are vulnerable species. So Neil Jordan, a conservation biologist at the University of New South Wales in Australia, came up with the “Eye-Cow” technique. The eyes painted on the cattle trick predators into thinking they’ve been spotted, similar to how butterflies with eye patterns on their wings ward off birds that would try to eat them.