Semnopithecus vetulus vetulus
Southern Purple-faced Leaf Langur
Habitat destruction due to deforestation, expanding tea plantations, and urbanization are major threats to the species. Hunting for meat and furfor making drums at village level has also been recorded. In some casesthey are shot dead when they enter home gardens and or cultivated areas (Nekaris &Wijeyeratne, 2009). Electrocution is a major threat to the smaller troops trappedin small pocketsof forests in urban areas.Un-organized translocation schemes of Langur groups coming into conflict with humans pose a threat to taxon survival and overall biodiversity.
Semnopithecus vetulus monticola
The Highland Purple-faced Leaf Langur, Shaggy Bear Monkey
It was hunted and killed for its flesh and skinto make rugs and furs in early 1930s (Phillips, 1935).Presently, its habitats are under threat due to expansion of mountain vegetable cultivation and human settlements. When it enterscultivated lands near the forest edges it can become the victim of farmers or dogs (Goonatilake, Per. Observation).
Semnopithecus vetulus nestor
Western Purple-faced Leaf Langur
Due to urbanization, habitat loss is the major threat to this species. Other major threats are electrocution,dogand human killings when they enter cultivated lands or have to travel across open areasas observed byNekaris andWijeyeratne (2009). Local extinctionshave been observed within its range (Goonatilake per obser.).
Semnopithecus vetulus philbricki
The Northern-eastern purple-faced leaf Langur
The major threat to the species is habitat loss due to expanding human settlements, shifting cultivation, and large-scale land clearance for agriculture and deforestation. Hunting is also recorded for its meat and skin at local village level.Its skin used to prepare drums (Phillips, 1935; WCSG, 2010; Goonatilake Per. Observation).