Located 15 km north-west of Jember or 20 km east of Bondowoso, this area includes Gunung Argopuro (3088 m). There is a hotspring at the foot of Gunung Argopuro in the south of Aing Alkal River. Tunjung Lake is located on the southern part of the area. geologically this area is same with other formed mountains in Java & Bali (Beudels & Hardi 1980). The area is very steep with good forest condition.
Non-bird biodiversity: Cuon alpinus, Panthera pardus, Sus verrucosus and Trachypithecus auratus (Hedges & Tyson 1996, Whitten et.al.1996, Nijman 1997). Flora include Anophalis viscida, Elsholtzia pubescens, Euphorbia spp., Pteridium sp. and Giardinia palmata (Beudels & Hardi 1980, Whitten et.al.1996).
BirdLife International (2023) Important Bird Areas factsheet: Dataran Tinggi Hyang. Downloaded from http://www.birdlife.org on 27/01/2023.