Dr. Rodrigo Medellin began studying bats as an eight-year-old, when he raised vampire bats in a bathroom at his parents' house. Today, the biologist is internationally known as The Bat Man of Mexico and has spent his career studying bats all over his country. But there are two species, deep in the Mayan rainforest, that Rodrigo has longed to study. Both species are very rare, very large, and very carnivorous. Join Rodrigo and National Geographic photographer Anand Varma as they team up in search of these rare and elusive creatures. The World Premiere took place at Mountainfilm 2016 in Telluride, Colorado.