It is located in the Upper Dibang Valley district covering an area of 4,149 km2 (1,602 sq mi).

Rare mammals such as Mishmi takin, red goral, musk deer (at least two species), red panda, Asiatic black bear, occasional tiger and Gongshan muntjac occur while among birds there are the rare Sclater's monal and Blyth's tragopan.

It has been named the Mishmi Hills giant flying squirrel (Petaurista mishmiensis).

[3] Dibang Wildlife Sanctuary is located fully or partly within Dihang-Dibang Biosphere Reserve It is protected by the Department of Environment and Forest of Arunachal Pradesh.

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