A unique thorny scrub forest with the xerophyte species, Chinnar is the habitat for the endangered Giant Grizzled Squirrel of India. The last world count of these squirrels was less than 200. Located in the rain shadow area of the Western Ghats, unlike other sanctuaries in Kerala, Chinnar gets only 48 days of rain every year.
Rich in wildlife, the mixed deciduous forests here are ideal for trekking. An extensive sandalwood forest nearby is an added attraction. This is also an ideal place to watch herds of bison march past. Dry deciduous forests, high shola forests and wet grasslands add to the diversity of the sanctuary.
As one travels from Karimuthi to Chinnar, Elephants, Spotted Deer, Sambar Deer, Hanuman Langurs and even peacocks can be spotted on either side of the road.