Several exotic species of orchids, abundant ferns, epiphytes, wild banana, arums, climbers and lianas are found in this forest habitat. Important tree species such as: Mekai, Dhuna, Udiyam, Nahar, Sam kothal, Bheer, Hollock, Nahor, Au–tenga (elephant apple), different species of Dimoru etc. envelope the forest.
The rich biodiversity of Dehing Patkai include about 46 species of mammals, 283 species of birds, 276 species of butterflies, 70 species of fish, 71 species of reptiles and 70 species of dragon flies that are found scattered within the sanctuary