They drink blood for survival, but it's not humans that vampire bats are after. Instead, they prefer livestock as their source for a meal. Found in Mexico, Central and South America, vampire bats are surprisingly quite small, and one might even say, adorable. They also play an important role in their ecosystem. As part of the Rolex Perpetual Planet Initiative, Mexican conservationist Rodrigo Medellín researches the often-vilified winged mammals and has spent the last 4 decades campaigning to save bats in his home country. #CallToEarth #PerpetualPlanet