Laguna de Atotonilco. 18/03/06; Jalisco; 2,850 ha; 20°22'N 103°39'W. Priority Area for Conservation. Situated along the neovolcanic axis, the area around the site presents geothermal springs often used for recreational activities. Noteworthy fauna includes reptiles such as a nationally endangered toad (Bufo marinus), snake (Thamnophis eques), striped lizard (Cnemidophorus communis) and an endemic frog (Rana megapoda) also considered vulnerable by IUCN. In addition, the aquatic vegetation also provides spawning ground for several fish species. Archeological excavations have unearthed rudimentary objects (arrow heads and clay figures), as well as mammoth, rhino and bison fossil remains. Deforestation and water infrastructure works are two of the greatest threats to the integrity of the site. Ramsar site No. 1607. Most recent RIS information: 2006.