Complejo Lagunar Bahía Guásimas  Estero Lobos. 02/02/08; Sonora; 135,198 ha; 27°32'N 110°29'W. A wetland ecosystem located in the northwest coast of the Mexican Pacific, with mangrove areas composed of the species Avicennia germinans, Laguncularia racemosa and Rhizophora mangle. It is of great importance for hibernation of aquatic migratory and coastal birds, supporting 4% of the aquatic migratory bird populations in the winter and 9.4% of the coastal birds observed in the northern Pacific coastal zone. Among the bird species found are Egretta rufescens, Rallus longirostris, Rallus limicola, Sterna antillarum, Grus canadensis, Branta bernicla, among others. Mammal species such as Zalophus californianus californianus, Tursiops truncatus, Globicephala macrorhynchus, Delphinus delphis and Myotis vivesi can also be observed. Its bays and estuaries are reproduction, nursery and development grounds for species such as the Blue Shrimp (Penaeus stylirostris). Fishing (mainly shrimp and oyster), agriculture, hunting and extensive livestock are the most common activities undertaken. There is currently a proposal to establish the Aquatic Wildlife (Flora and Fauna) Protection Area Bahía Lobos. Ramsar site no. 1790. Most recent RIS information: 2008.