Tinfunque. 07/06/95; Pte. Hayes; 280,000 ha; 24°15'S 059°30'W. National Park. An alluvial plain along the Pilcomayo River which is flooded much of the year and characterized by patches of forest, extensive, clustered lakes, and savannas of palm groves. Watercourses follow ancient riverbeds, with gallery forest growing alongside. Another sector is composed of vast, dry plains of grasses and shrubs. Located in the tropical deciduous dry forest biogeographical region, the site, in outstanding condition, is a good representative of biodiversity. Situated along the migration route, birds are abundant in species and number. Several threatened wildlife species (rhea, caiman, turtle, and jaguar) and fish species breed here. The site is important for Potamogeton striatus, a critically endangered plant, and supports a distinct mammalian fauna. Extensive ranching, extraction of forest products, and poaching occur. The site shares a border with Argentina. Ramsar site no. 730. Most recent RIS information: 1995.