Estero Majahuas. 02/02/08; Jalisco; 786 ha; 19°50'N 105°21'W. A good representative of the transition zone where biotic elements of the Neartic and Neotropical biogeographic regions come together. The vegetation found in the margins of the marsh is composed mainly of the mangrove species Rhizophora mangle and Laguncularia racemosa, both under special protection. The site supports around 60 species of aquatic birds including Fulica americana, Porphyrula martinica y Gallinula chloropus), Anas spp, Dendrocygna autumnales, Chroroceryle americana, Ceryle alción, Larus heermanni, Sterna elegans, Mycteria americana, Egretta refucens and Ardea herodians. The marsh holds a great number of the crocodile species Crocodylus acutus and the marine turtle Lepidochelys olivacea, which uses the beaches during nesting periods. Traditional river fishing and ecotourism are the main activities undertaken in the site. Among the threats to this ecosystem are mangrove deforestation and extension of agriculture and livestock areas. Ramsar site no. 1792. Most recent RIS information: 2008.