Kottamala in Rajapalayam to Perumal Malai in Sathuragiri Hills near Sundara Mahalingam temple in Saptoor. A tiger was also seen in Sathuragiri during the 2009 census. In recent years there has been a significant increase in the population of the tahrs with the census in 2011 putting their numbers at 220 individuals. Recognised as an Important Bird Area, over 275 species of birds are seen in this sanctuary including 14 species of birds endemic to the Western Ghats, such as the critically endangered Oriental white-backed vulture and the long-billed vulture, vulnerable species Nilgiri wood-pigeon, broad-tailed grass warbler, red-faced malkoha and the white-bellied shortwing (Brachypteryx major) and near threatened species like the great pied hornbill, Nilgiri pipit, black-and-orange flycatcher and the Nilgiri flycatcher. The Malayan night heron is of lesser concern. The primary raptors here are the serpent eagle, hawks and black eagle. A bird survey in 2013 observed in the sanctuary rare endemic species including Sri Lankan frogmouth, mountain and rufous-bellied hawk-eagles, great Indian and Malabar pied hornbills, mountain and green imperial pigeons which are all species found only in the higher altitudes of Western Ghats. Some of the rare migratory birds spotted included the steppe eagle, Eurasian sparrowhawk and bluecapped rockthrush. The sanctuary has numerous reptiles including king cobras, Indian rock python and many endemic species namely pit vipers, ornate flying snake, Draco or gliding lizard, large-scaled calotes and Monilesaurus ellioti and amphibians including endemic ones like Micrixalus, Indirana, Nyctibatrachus, Ramanella, Rhacophorus malabaricus, Raorchestes and Pseudophilautus. There are over 220 species of butterflies documented in the sanctuary including many rare and endemic species. Some of the rare butterflies spotted here include Evershed's ace, silver royal, orange awlet, and Hampson's hedge blue. Flora The sanctuary is a mix of tropical evergreen forests and semi-evergreen forests (), dry deciduous forests and moist mixed deciduous forests (), grassland () and cultivated () km2. The sanctuary has one Medicinal Plant Conservation Area (MPCA) located at Thaniparai. 69 plant species belonging to 58 taxa and 42 families are used by the Paliyar tribal people, living in the sanctuary, to treat 15 ailments. Conservation The conservation problems affecting the sanctuary are human-elephant conflict, human encroachment, cattle grazing and forest fire. Within the sanctuary, there are 7 to 10 temples which attract thousands of pilgrims every year. Water scarcity is a major problem during dry season due to lack of perennial water source. Measures have been