Laguna de Santiaguillo. 02/02/12; Durango; 24,016 ha; 24°50'15"N 104°51'35"W. Comprises two small lakes, Laguna Superior, which is permanent, and Laguna Inferior, intermittent. Located along one of the most important routes for birds that nest in Alaska and Canada, the site has become the most important site for aquatic bird hibernation in Durango, and this semi-desert region, it has a major hydrological influence of climate regulation. It provides habitat to a variety of IUCN Red-Listed mammals, such as Choeronyteris mexicana, Leptonycteris curasoae, Leptonycteris nivalis, and the badger Taxidea taxus. It also supports 31 species of endemic herpetofauna, and 292 bird species have been reported, of which 29 are considered to be endangered. The site is considered one of the 30 Most Important Wetlands in North America, and is listed as an Important Area for Bird Conservation by Mexican authorities. Together with groundwater over-extraction and water pollution, threats include management problems and drought conditions of the system. Ramsar Site no. 2046. Most recent RIS information: 2012.