Esteros De Iberá is the second largest wetland in the world, located in Corrientes Province, Argentina. It covers 1.3 million hectares and contains high biodiversity, including 125 fish species, 40 amphibian species, 344 bird species, 60 reptile species, and 85 mammal species. However, the wetlands face threats such as embankments, pollution, habitat fragmentation, overhunting, and invasive species. Conservation efforts are ongoing to protect the ecosystem and promote sustainable use.