Forests mostly consist of moist deciduous vegetation interspersed with evergreen and semi-evergreen habitat; there are also two all-season waterfalls in the sanctuary.
[3] The sanctuary sustains a good mammal population due to its rich habitat and plenty of perennial streams.
Gaur or Indian Bison (Bos gaurus),[2] Malabar giant squirrel (Ratufa indica),[4] four-horned antelope or chousingha (Tetracerus quadricornis), leopard (Panthera pardus),[4] black sloth bear along with a host of other predators and herbivores find home in the sanctuary.
Birds like the rare Malayan night heron (Gorsachius melanolophus), Nilgiri wood pigeon (Columba elphinstonii), great pied hornbill (Buceros bicornis),[4] grey-headed bulbul (Pycnonotus priocephalus),[5] white-bellied blue flycatcher (Cyornis pallipes), Wynaad laughingthrush (Garrulax delesserti), white-bellied treepie (Dendrocitta leucogastra), rufous babbler (Turdoides subrufa) have been sighted many times in the sanctuary.
[6] The sanctuary also hosts remnants of ancient forests featuring the distinctive Myristica swamp ecosystem, which dates back over 100 million years.