National Park forest area of Bukit Baka-Bukit Raya dominated by Schwaner mountain peaks. The existence of these mountains is representative of the types of mountainous tropical rain forest ecosystem with high relative humidity (86%).
Recorded 817 species of plants belonging to 139 families such as Dipterocarpaceae, Myrtaceae, Sapotaceae, Euphorbiaceae, Lauraceae, and Ericadeae. In addition there are plants for medicine, handicrafts, furnishings / building, consumption, and various types of forest orchids. There is interest Raflesia (Rafllesia sp.) Which is the largest parasite interest and also growing on Mount Kinabalu Malaysia. Among other endemic plants Symplocos rayae, Gluta sabahana, Dillenia beccariana, Lithocarpus coopertus, Selaginnella magnifica, and Tetracera glaberrima.
Mammalian fauna that can be found among other clouded leopard (Neofelis nebulosa), orangutan (Pongo Satyrus), sun bear (Helarctos malayanus euryspilus), red monkey (Presbytis rubicunda rubicunda), lemurs (Nyticebus coucang borneanus), sambar deer (Cervus unicolor brookei) , flying squirrel (Petaurista banksi elegans), and striped skunk (Visvessa tangalunga).
Bird species living in national parks, among others, hornbills ivory (Rhinoplax vigil), rhinoceros rangkok (Buceros borneoensis rhinoceros), black hornbills (Anthracoceros malayanus), delimukan emerald (Chalcophaps indica), uncal kouran (Macropygia ruficeps), pheasants king (Argusianus argus grayi), and the Borneo pygmy pheasants (Polyplectron schleiermacheri). Pheasants pygmy species endemic to the island of Borneo is the most endangered due to human activities in the forest.