Wilpattu National Park the largest wildlife sanctuary in Sri Lanka span an area of no less than 131,693 hectares with altitude ranging between the sea-level and 152 meters. It is situated in the dry zone, and is unlike any other wildlife sanctuary in Sri Lanka. Wilpattu sanctuary was declared as a National Park in 1938, Wilpattu National Park is located on the west coast close to the historical city of Anuradhapura .The dry zone jungle is thickly grown. Wilpattu National Park is home for many villus, or natural lakes which dot the landscape in the Wilpattu National Park. Except for two, these lakes contain rainwater, thus are important for resident and migratory water-birds.