José Gabriel Martínez-Fonseca divides his time between Nicaragua and Arizona, where he recently completed a PhD in bat ecology. He owns almost as many headlamps and cameras as Charles does and has contributed images to wildlife publications worldwide. He is also very adroit at catching bats and tarantulas, among other creatures. Martínez-Fonseca is the coauthor, along with Charles Hood and Erin Westeen, of Sea Turtles to Sidewinders: A Guide to the Most Fascinating Reptiles and Amphibians of the West.