Térraba-Sierpe Wetland (), is a protected area in Costa Rica, managed under the Osa Conservation Area, it was created in 1994 by decree 22993-MIRENEM. It has been designated as a protected Ramsar site since 1995.
Flora and fauna The wetland has been documented as home to around 200 species of fish, 60 species of crustaceans, 46 species of molluscs, 9 species of amphibians, 27 species of reptiles and 148 species of birds.
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