Silent Valley National Parkis about 40 km from Mannarkkad, Palakkad district, North Kerala, located in the Nilgiri Hills , spread an area over 236.74 sq kilometer. The Landscape is a tropical evergreen forest, huge trees, thick undergrowth. It receives heavy rains during the monsoons. The notable flora and fauna of the valley includes Lion tailed macaque, elephant, leopard, tiger, nilgiri thar, Malabar giant squirrel.There are numerous variety of mammals including deer, gaur.Birds like hornbills, Malabar whistling thrush are also seen. Many other frequent birds are drongos, tailorbirds, spotted dove, koels.
The climate of the Silent Valley national park is humid during the rains falls in the month of June, July and August, otherwise generally hot and tropical. The River Kunthi descends from the Nilgiri hills, from an altitude of 2000 m above sea level, and traverses the entire length of the valley and rushes down to the plains through the deep forest. You can imaging such a collection of Western ghat biodiversity , more than 1000 species of flowering plants which include about 110 species of orchids, more than 34 species of mammals, about 200 species of butterflies, 400 species of moths, 128 species of beetles of which 10 are new to science, about 150 species of birds including almost all the 16 endemic birds of southern India.