Dibang Wildlife Sanctuary: A Core Protected Wildlife Reserve in the Arunachal Pradesh Himalayas

Dibang Wildlife Sanctuary is best known as a stronghold for rare Mishmi Hills fauna, including the Mishmi takin, red goral, red panda, and at least two species of musk deer, alongside highly localized birds such as Sclater's monal and Blyth's tragopan. It is also notable as the type locality from which the Mishmi Hills giant flying squirrel was described. The sanctuary draws additional recognition from its scale and position within the Dihang-Dibang Biosphere Reserve, where it anchors protection for one of the most biologically distinctive landscapes in the eastern Himalayas.

Dibang Wildlife Sanctuary was established in 1992 by the Government of Arunachal Pradesh, becoming one of the eight state-level wildlife sanctuaries in the state. Its creation reflected growing recognition of the ecological importance of the Upper Dibang Valley and the broader Mishmi Hills, where extensive tracts of relatively undisturbed eastern Himalayan forest remained.

Over subsequent years, Dibang gained additional conservation weight through its inclusion within the Dihang-Dibang Biosphere Reserve, an umbrella designation that links the sanctuary with surrounding landscapes to strengthen ecological connectivity and coordinated management. The sanctuary has continued to be administered by the Arunachal Pradesh Department of Environment and Forests, and its early-twenty-first-century designation as an IUCN Category IV area formalized its role as a habitat and species management zone rather than a strictly protected wilderness reserve.

The sanctuary occupies a large portion of the Upper Dibang Valley in the eastern Himalayas, a region characterized by steep ridges, deep river valleys, and dense montane forest cover. Elevation gradients within the area shift from lower subtropical river valleys into higher temperate and subalpine environments, producing strong habitat layering across the landscape.

The terrain is shaped by the tributaries of the Dibang River system, which carve through the Mishmi Hills and create a mosaic of forested slopes, gorges, and benches. Natural forest cover remains extensive throughout the sanctuary, with relatively limited human infrastructure, contributing to the continuity of habitat that supports wide-ranging mammals and forest-interior bird species.

Ecologically, Dibang Wildlife Sanctuary falls within the eastern Himalayan broadleaf and mixed forest biomes, with temperate forests dominating the middle elevations and subtropical elements in the lower valleys. The mosaic of habitats supports a diverse community of mammals, birds, and lesser-studied taxa typical of the Mishmi Hills ecosystem.

The sanctuary's position within or adjacent to the Dihang-Dibang Biosphere Reserve places it within a broader ecological network that links high-elevation habitats to lower forested corridors. This connectivity helps maintain the range of vegetation zones that species such as the Mishmi takin, red panda, and several pheasants depend on across seasons and elevations.

Dibang Wildlife Sanctuary is particularly significant for the rare mammals of the eastern Himalayas. It supports the Mishmi takin, a goat-antelope endemic to this region, as well as the red goral, the Gongshan muntjac, red panda, Asiatic black bear, and at least two species of musk deer. Occasional tiger records also highlight the sanctuary's capacity to sustain large carnivores despite its remote setting.

Among birds, the sanctuary is known for the rare Sclater's monal and Blyth's tragopan, both of which are prized eastern Himalayan species with limited ranges. The forest canopy and high-elevation forests also support a broad community of smaller mammals and forest birds, and the sanctuary has yielded new species descriptions, including the Mishmi Hills giant flying squirrel, which was identified from the edge of the protected area. Together, these species make Dibang one of the most important sites in India for the conservation of Mishmi Hills fauna.

The sanctuary is classified as an IUCN Category IV habitat and species management area, indicating that its management framework is oriented toward conserving particular species and their habitats, including species that require active monitoring and protection. Its inclusion within the Dihang-Dibang Biosphere Reserve strengthens this role by embedding the sanctuary in a larger landscape protection strategy.

Dibang's conservation value is amplified by its sheer size and by the relative integrity of its forest cover. The presence of rare and range-restricted species, from Mishmi takin and red goral to Sclater's monal and Blyth's tragopan, gives the sanctuary a national and regional importance for eastern Himalayan biodiversity conservation. Ongoing management by the Arunachal Pradesh Department of Environment and Forests supports this conservation framework at the state level.

Dibang Wildlife Sanctuary stands out for its combination of scale, ecological intactness, and concentration of rare eastern Himalayan species. Its location within the Mishmi Hills and the Dihang-Dibang Biosphere Reserve ties it directly to one of India's most distinctive high-biodiversity landscapes.

The sanctuary's importance is reinforced by its role as a type locality for the Mishmi Hills giant flying squirrel and as a refuge for iconic species such as the Mishmi takin, red panda, and Blyth's tragopan, placing Dibang among the key protected areas for eastern Himalayan wildlife conservation.