Located on the Schwaner mountains between West Kalimantan and Central Kalimantan.
Rice (1989) found the extention of elevation range distribution of Black-breasted Fruit-hunter Chlamydochaera jefferyi up to 1100 m asl. The information about birds in Schwaner Mountains is very limited and follow-up survey is needed.
Non-bird biodiversity: Pongo pygmeus, Presbytis rubicunda, Helarctos malayanus, Neofelis nebulosa (MacKinnon et.al 1996)
BirdLife International (2019) Important Bird Areas factsheet: Bukit Baka-Bukit Raya. Downloaded from http://www.birdlife.org on 25/05/2019.