Sinharaja Forest Reserve is a national park and a biodiversity hotspot in Sri Lanka. It is of international significance and has been designated a Biosphere Reserve and World Heritage Site by UNESCO. This Forest covers an extent of an approximately 11.187 ha. From east to west the length of the forest is 21 K.M’s. Situated in the south-west lowland wet zone of Sri Lanka and falling into the Sabaragamuwa and Southern provinces, Sinharaja is surrounded by Napola Dola, Koskulana Ganga (north), Maha Dola, Gin Ganga (south-west), the Kalukandawa Ela,Kudawa Ganga (west), Beverley Tea Estate and Denuwa Kanda (east). The elevation of the Sinharaja reserve ranges from 200m to 1300m. It has a rolling terrain consisting of a series of ridges and valleys, which assumes an east-west trend in the northwestern part of the reserve. In other parts of the reserve, the ridges and valleys assume a north-west/south-east alignment.