Forty five species of mammals are reported in the area, which include 6 Western Ghats endemics.
Of the 203 species of birds, 10 are endemics, 6 range restricted and 5 globally threatened species.
Thirteen of these are listed in the schedule I of the Indian Wildlife Protection Act (1972).
Preliminary surveys indicate the presence of 45 species of reptiles including 8 Western Ghats endemics.
This forested habitat is known to be an ideal haunt for King Cobra, the largest venomous snake in the world.
Thirty species of amphibians are known from this area of which 26 are Western Ghats endemics.
The amphibians include the recently discovered Philautus ponmudi, P. anili, P. tuberohumerus, P. neurostegona,
P. ochlandrae, P. akroparallagi and P. chromasynhysi . The type locality for P. ochlandrae is the reed brakes of
Kakkayam dam site, the only known site for this species.
The streams of Kakkayam support 52 species of fishes including 21 Western Ghats endemics. The hill stream
habitats of Kakkayam are also known for the endangered Mahseer, Tor khudree. A total of 143 species of
butterflies including 8 Western Ghats endemics are known from this area. Fifty one species of Dragon flies
which include 11 species of Western endemics are reported from the region.