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Bat acoustic libraries are important tools that assemble echolocation calls to allow the comparison and discrimination to confirm species identifications. The Sonozotz project represents the first nation‐wide library of bat echolocation calls for a megadiverse country. It was assembled following a standardized recording protocol that aimed to cover different recording habitats, recording techniques, and call variation inherent to individuals. The Sonozotz project included 69 species of echolocating bats, a high species richness that represents 50% of bat species found in the country. We include recommendations on how the database can be used and how the sampling methods can be potentially replicated in countries with similar environmental and geographic conditions. To our knowledge, this represents the most exhaustive effort to date to document and compile the diversity of bat echolocation calls for a megadiverse country. This database will be useful to address a range of ecological questions including the effects of anthropogenic activities on bat communities through the analysis of bat sound.

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La presente contribución tiene como objetivo dar a conocer seis nuevos registros de anfibios y reptiles y confirmar la presencia de una especie en Guanajuato. Los ejemplares fueron colectados entre los años 2003 y 2006 en varias localidades de los municipios de San Luis de la Paz, Victoria y Xichú, que actualmente forman parte de la Reserva de la Biosfera “Sierra Gorda de Guanajuato” y se depositaron en la colección Herpetológica de la Escuela Nacional de Ciencias Biológicas, del I.P.N. Los nuevos registros de anfibios son: Chaunus marinus y Ollotis nebulifer, los de reptiles son: Sceloporus variabilis, Plestiodon tetragrammus, Boa constrictor y Masticophis flagellum. El registro de Lithobates berlandieri confirma la presencia de esta especie en Guanajuato.

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