The reptile population is rather dense with 45 species of reptiles. Snakes like king cobra, Malabar pit viper, and striped coral snake, the Indian Monitor Lizard, the endemic striped-coral snake Krait, among other non-poisonous snakes. Amphibian population includes Malabar Gliding Frog, Fungoid Frog, Bicolored Frog, among many species of caecilians and toads. Along with the South India's largest butterfly the southern birdwing and the highly threatened Travancore-evening-brown, there are 160 species of butterflies in the region.
The flora of the region is what makes it dense and magical. The flora comprises of 140 species of orchids and 171 species of grass. The forest is impenetrable with tropical evergreen and moist deciduous forests and grasslands. Teak, rosewood, Terminalia, sandalwood, jacarandas, mangoes, tamarind, banyans, sacred fig, bamboos and the only south Indian conifer, Nageia wallichiana grows in abundance. Several medicinal and endemic plants also add up to the flora of the region. The plantations around the park are majorly tea, cardamom and coffee. Most of the plantations are focused on multi-crop farming.