02/02/2013; Beni; 2,813,229 ha; 12°18'32"S 066°06'11"W. Reserva Natural, Área de Manejo Integrado. A very large mosaic of ecosystems formed basically of recent alluvial plains, rivers, lakes, and marshes. Located in a transition zone, the site presents unique characteristics in terms of ecosystem formation processes and vegetal succession. It is estimated that the site supports more than 50,000 waterbirds; some 13 migratory species visit, and the site hosts more than 1% of the global population of the Cattle Egret Bubulcus ibis. The fish community of the Marmoré river basin numbers 394 species, representing 55% of the fish species in the Amazon basin, and the site hosts more than 1% of the global population of the Bolivian river dolphin Inia boliviensis. There also 24 threatened species of vertebrates, including the Giant Otter. As elsewhere in the Amazon basin, the importance of rubber exploitation generates severe cultural and socio-environmental impacts which can have drastic effects on the indigenous population. The Ramsar Site is part of two Nature Reserves and the municipal Área Natural de Manejo Integrado Pampas del Río Yacuma. Ramsar Site no. 2094. Most recent RIS information: 2013.