A Coastal wetland of Semi-Natural origin located in the Dry Zone of the North-Western province. The Annaiwilundawa Sanctuary has been declared as Sri Lanka?s second Ramsar site and been added to the list of Wetlands of International Importance. The Annaiwilundawa Wetland in the Puttalam District, in the North West, covers an area of more than 1,397 hectares. The Sanctuary is comprised of an ancient system of human-made cascading tanks or reservoirs ranging from 12 and 50 hectares each, dating back to the 12th Century. Around 40% of the vertebrate species, a few species of threatened fish, amphibians, birds, mammals and migratory birds fleeing harsh winters are found in Annaiwilundawa in Sri Lanka.
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