Describe as steep slopes, located between 800-1500 m elevation, and almost all area is unoccupied, only some of Penan villages in isolated river valley. The way of life of the people is nomadic and practised shifting agriculture, hunting and gathering other forest product such as "gaharu", bird nest etc.This area is reported as one of virgin/pristine forest in Kalimantan (Momberg et.al. 1998a).
Sujatnika et.al (1995) describe the following species occured in this area, Mountain Barbet Megalaima munticola, Hose's Broadbill Calyptomena hosii and Bornean Whistler Pachycephala hypoxantha.
BirdLife International (2019) Important Bird Areas factsheet: Ulu Telen. Downloaded from http://www.birdlife.org on 24/05/2019.