Located in the north-western part of Huanjiang County, the northern part of the reserve is linked to Maolan Nature Reserve (CN290) in Guizhou. The IBA has well-preserved central subtropical evergreen deciduous forests, and a typical karst landscape.
Non-bird biodiversity: Important plants include Kmeria septemrionalis and Pseudotsuga brevifolia. Animals include Python molurus, Selenarctos thibetanus, Macaca mulatta, Macaca thibetana, Viverra zibetha, Felis temmincki, Panthera pardus, Moschus berezovskii and Naemorhedus goral.
BirdLife International (2019) Important Bird Areas factsheet: Mulun Nature Reserve. Downloaded from http://www.birdlife.org on 15/10/2019.