Sairandhri Vanam, meaning the forest in the valley, as referred to in the Mahabharatha and the River Kunthi give a mythological dimension to the National Park. The Silent Valley is seldom silent but it has an inexplicably unique character about it, what with the dense forest, the music of the birds and its quitet majesty.With an area of close to 90 sq.kms, the park is situated in the north-eastern corner of the Palakkad district. It rises abruptly to the Nilgiri plateau in the north and overlooks the plains of Mannarkkad in the south. The river Kunthi descends from the Niligiri hills above an altitude of 2000 m and traverses the entire length of the valley finally rushing down to the plains through a deep gorge. River Kunthi never turns brown; it is crystal clear, perennial and wild.

Flora

The forests belong to the biogeographical class of the Malabar rain forests and harbour about 1000 species of plants. The flowering plants here include 966 species to 134 families and 599 genera. The dicotyledons are 701 in number, distributed among 113 families and 430 genera; monocotyledons are 265 distributed among 21 families and 139 genera. The 5 dominant families recorded from Silent Valley are;

1. Orchidaceae with 108 species belonging to 49 genera, Febaceae with 545 species representing 26 genera,

2. Rubiaceae with 49 species representing 27 genera and

3. Asteraceae with 45 species representing 25 genera. Many of these are rare and endangered and some are now lost elesewhere

The following are some of the new specieis and genera recorded recently from Silent Valley - Hedyotis silentvalleyensis, Kanjaram palghatensis, Porpax chandrasekharanhii, Silentavelleya nairii, Nydnocarpus pendulus etc.

New species of orchids recorded are:

1. Oberonia bisaccata, Liparis indiraii, Eriatiagii, Ipsea malabarica, a ground orchid rediscovered after a lapse of more than a century and

2. Scutellaria oblonga and Anodendron rhinosporum, two Sri Lankan plants have also been recorded.

Fauna

The valley has a fair representation of all peninsular mammals. They are lion - tailed macaque, Nilgiri langur, bonnet macaque, tiger, leopard (Panther), leopard cat, fishing act, common palm civet,small Indian civer, brown plam civet, ruddy mongoose, stripenencked mongoose, wild dog, sloth bear, otter, flying squirrel, Malabar gaint squirrel, Indian pangolin (scaly anteater), Porcupine, wild boar, sambar, spotted deer, barking deer, mouse deer, gaur and elephant.

         Birds include rare such as Indian black-crested baza, bonellis' hawk eagle, rufous bellied hawk eagle, shaheen falcon, short-eared owl, penisular scops owl, Ceylon frog mouth, great Indian hornbill, Niligiri laughing thrush, house martin, rufous bellied shortwing, Malay bittern etc. About 170 species have been recorded of which 31 are migrants.The fauna include a number of possible new species, a few very primitive animal groups, notably Ceacilians (limbless amphibians) and some rare small mammals such as the Peshwa's bat and heary-winged bat.Butterflis and moths are varied and plenty. There are more than 100 species of butterflies and 400 species of moths. Quite a few of them are extremely rare and endemic.

           The Silent Valley is a veritable treasure house-a gene pool of tropical flora and fauna. This has to be protected from human depredation and cherished for all times to come.

Tropical Rain Forests

Tropical evergreen forests occurring within a narrow strip above the equator is perhaps the most endangered natural habitat. Extremely fragile, it has suffered most from human interaction.In species diversity it is the richest habitat and has developed in area of the heaviest rain fall. That there is a very little soil erosion and that the rains are transformed into perennial streams and rivers may be attributed to thick canopy and closely packed tree stumps. In fact, scarcity of water is rarely felt. The evapotranspiration from these forests is much higher than from any other surface. This cools the atmosphere helping easy condensation of water vapor. This is the origin of the much-awaited summer rains.

          Wild fires lead to abrupt changes in the eco system degrading the forest. When the Britishers entered the Silent Valley more than a century ago, these forests were untouched and extended enormously on all sides. They named it the Silent Valley because there were no cycads then. Today however, true evergreen forests untouched by man is only a dream.

          Unlike most other sanctuaries, viewing wild animals in this park is quite difficult because of the thick vegetation.

Wildlife Toursim

Area                     : 89 sq.kms.

Permission          :Division Forest Officer, Palakkad,Kerala - 678 009

Accommodation : Rest House

Nearest town      :Mannarkkad (32 kms)

Nearest airport   :Coimbatore (115 kms)