The government of Mexico has designated Humedales de Bahía Adair (42,430 hectares, 31º35’N 113º53’W) in Sonora state, effective last World Wetlands Day, 2 February 2009, as its 113th Wetland of International Importance. As summarized by Ramsar’s Nadia Castro, the site is composed of three types of habitats, including estuaries, artesian wells, and salt marshes, and is located in the Gran Desierto de Altar, one of the most arid and extreme deserts of North America.
The site supports 12 fauna species found under special protection in Mexican law, such as the endangered Desert Pupfish (Cyprinodon macularius) endemic to the region, and species listed in CITES such as the marine turtles Caretta caretta, Chelonia agassizi, Chelonia mydas, Dermochelys coriacea and Lepidochelys olivacea. Three fish species, Gillichthys seta, Anchoa mundeoloides and Leuresthes sardina, are endemic to the northern Gulf of California, as well as two endemic flora species: Distichlis palmeri and Suaeda puertopenascoa. The main hydrological value of these wetlands is the presence of the Sonoyta-Puerto Peñasco Aquifer of prehistoric formation. The main land uses include tourism and real estate in the coastal zone, conservation, salt extraction, scientific research, environmental education, subsistence fishing, oyster culture and ecotourism.