Ramsar site no. 822. Pa l de Boquilobo. A freshwater marsh subject to winter floods of the Tejo River. The site supports characteristic aquatic vegetation and various tree species create hedges around the wetland, providing excellent cover for breeding waterbirds and other fauna. The site, an internationally important wintering site for Anas acuta , includes a major heronry.
Human activities are agriculture and, in the surrounding areas, hunting.
The area is important for maintaining the water table. Ramsar site no. Special Protection Area EC Directive. Permanently inundated freshwater marsh in an open alluvial plain with extensive reedbeds, Salix , and other marshland species. A freshwater spring ensures water availability in exceptionally dry years.