ALT Bats are the focus of Rodrigo Medellín Legorreta’s research and conservation efforts. He helped bring the lesser long-nosed bat, or tequila bat, back from the brink of extinction. Now, the conservation biologist is puzzling out how North America’s two biggest bats—the woolly false vampire bat and the spectral bat—manage to coexist on the Yucatán Peninsula and how they will cope with climate change and forest fragmentation due to the Maya Train.