[1] On the Chinese side, they form the southern parts of Nyingchi Prefecture in the Tibet Autonomous Region.

The rocks of eastern lesser Himalaya and the central crystallines appear to be largely attenuated and truncated in Mishmi Hills.

This hilly area is characterised by steeply sloping landform, sub-tropical evergreen forest and high rainfall.

Temperate conifers, sub-alpine woody shrubs, alpine meadows, bamboos and grasslands are found in this region.

[3] Some of them are Sclater's monal, Blyth's and Temminck's tragopan, chestnut-breasted partridge, rufous-necked hornbill, pale-capped pigeon, Ward's trogon, dark-sided thrush, green and purple cochoa, rusty-bellied and Gould's shortwing, beautiful nuthatch, Mishmi and wedge-billed babbler, fire-tailed myzornis, at least four parrotbill species, black-headed greenfinch, scarlet finch and grey-headed bullfinch.

[8] The major part of Dihang-Dibang Biosphere Reserve and the whole of Dibang Wildlife Sanctuary falls within the area of Mishmi Hills [9] Temperatures ranges from below 5 °C in winter to 38 °C in summer.