Primary tropical rainforest in Sri Lanka, which covers an area of 11,187, ha (Hectares).also an UNESCO World Heritage Site located within Sabaragamuwa and Southern provinces of the south-west lowland wet zone.
Sinharaja is the country's last viable area of primary tropical rainforest. Sinharaja Forest Reserve, the best-known rainforest in Sri Lanka, is well worth a visit from anyone who is interested in the natural resources of this country.
The forest is home to a variety of species of birds and animals. The complex vegetation structure of the rain forest provides a variety of dwelling places or niches for animals. Thus, not surprisingly, there is a rich diversity of fauna within a rain forest.
Animals are often thought to be a passive or dependent component of the ecosystem that do not contribute actively to the continuity and growth of the forest. Lower plants such as Ferns and epiphytes of the 25 endemic species 13 have been recorded within Sinharaja itself and also some 65 butterfly species the Blue Mormon(papilio crino) is the commonest one recorded in the Sinharaja Forest.