The Site is a freshwater wetland complex in western Madagascar, located within the Menabe Antimena Protected Area. It comprises a shallow seasonal lake, extensive permanent marshes and the Mandroatsy river, which ensures year-round water availability. Dense marsh vegetation dominated by Typha angustifolia plays an important role in water filtration, sediment retention and flood regulation, while the surrounding dry deciduous forests and baobab stands contribute to the broader landscape. This mosaic of habitats supports a range of endemic and threatened species, including nesting and migratory waterbirds such as the globally endangered Bernier’s teal (Anas bernieri) and Humblot’s heron (Ardea humbloti), the vulnerable Madagascar plover (Charadrius thoracicus), the fish Paratilapia polleni, the Nile crocodile, several lemur species and the critically endangered flat-tailed tortoise (Pyxis planicauda). The Site provides essential ecosystem services to local communities, including fish resources, fresh water, grazing areas and raw materials for basketry and housing. However, its ecological character is under threat from agricultural expansion, vegetation clearance, fire, invasive alien species and recurrent droughts linked to climate change. A Site-specific management plan is being implemented to address these pressures and to support the Site’s long-term conservation and wise use.