Many years ago, La Boca Cave used to host an important population of Mexican Free-tailed bat as well as other species. Easy access to the cave made it so vulnerable that the populations had decreased to a very low number. Thanks to the efforts of Pronatura in coordination with Tecnologico de Monterrey, Tecnologico de Ciudad Victoria and the absolute and unconditional support from BCI, populations of both Mexican Free-tailed bat and Ghost-faced bat have recovered during the last three years. While protecting this maternity cave, we conserve a rich ecosystem and the habitat of a bat population that helps us to get more abundant crops and reduce numbers of disease vectors in a wide area. It is not only about a fence: educational material from BCI helps our students to transform our visitors to the cave into our partners in conservation.