Madu Ganga River, located near two popular coastal towns, is the second-largest wetland in Sri Lanka. It has rich biodiversity, with over 500 species of plants and animals.

Madu Ganga, a bio-rich wetland, was declared under the Ramsar convection on December 11, 2003. It covers an area of over 915 hectares and is located in the south of Sri Lanka.

To date, only a few 100-year-old trees have been recorded at Madu Ganga Sri Lanka, but the researchers have been able to record a population of about 50 plants that are between two and 20 years of age ...