B.R Hills Wildlife Sanctuary serves as a link between both the Western Ghats as well as the Eastern Ghats. The sanctuary runs along the river Cauvery and this river flows towards the south eastern side. At kollegal, the river Cauvery takes a sudden turn and again returns back to its starting point. The unique position of the sanctuary has helped it to provide shelter to various rare species of vegetation.
Flora & Fauna B.R Hills Wildlife Sanctuary holds varied type of vegetation cover that includes evergreen, deciduous & grassland vegetation. The sanctuary offers shelter to different species of animals, some of which belongs to the rare species. The chief attractions of the sanctuary are the gaur, chitals that are found in large numbers.
Excluding the above two, one can also view other animals like elephant, jungle cat, leopard, porcupine, bonnet macaque, spotted deer, sloth bear, tiger, mongoose, Malabar giant, sambar, common langur and many more.
Avifauna The sanctuary is a home to around 270 species of different types of birds. The most common one that one can easily see around are racquet-tailed drongo, whistling thrush, crested hawk eagle, yellow throated bulbul, etc.