The Knuckles Mountain has taken its name from a series of recumbent folds and peaks in the west of the massif which resembles the knuckles of the clenched fist when viewed from certain locations in the Kandy District. Knuckles Mountain Forest Range that covers an area of approximately 21,000 ha. is a part of the Central Highlands World Heritage site, declared in 2010. The Forest Range supports a rich biological diversity with 128 species of birds, 20 species of amphibians, 53 species of reptiles, 15 freshwater species and 31 mammal species. All species are not equally distributed throughout the range. Their distribution depends on multiple factors such as food availability, availability of nesting sites etc. This vary with climate, elevation and land cover.