The Ria Lagartos Biosphere Reserve is a protected area located in the southern part of Mexico, where the waters of the Gulf of Mexico meet the Caribbean Sea in the state of Yucatan. The reserve covers a large estuary where fresh water mixes with salt water, known in Spanish as ría. Its biodiversity is characterized by an abundance of mangroves, birds, and reptiles. There are also small populations of cats, such as the jaguar. Ria Lagartos is the largest nesting area for the American Flamingo, which reproduces and feeds along the estuary. Within the reserve there are three fishing communities, El Cuyo, Ria Lagartos and Las Colorados, as well as a large salt pan.