Hollongapar Gibbon Wildlife Sanctuary

Hollongapar Gibbon Wildlife Sanctuary is an isolated evergreen forest sanctuary located near Mariani in Jorhat district, Assam. Covering about 20.98 sq km, it was notified as a wildlife sanctuary in 1997. It is notable as the only sanctuary in India dedicated to gibbons and harbors India's only ape, the western hoolock gibbon, along with six other primate species. The sanctuary is known for its dense semi-evergreen forest, rich biodiversity and primate conservation importance.

Visitors can expect a compact, dense semi-evergreen forest patch surrounded by tea gardens, with narrow forest trails and tall Hollong trees. The main experience is guided nature walks for primate watching, especially western hoolock gibbons swinging in the canopy, along with other primates, birds and butterflies. There are no large tourist structures inside; exploration is on foot with a forest guide, with opportunities for photography and birdwatching in a quiet, natural forest environment.

The area was first notified as a reserved forest in 1881. It was declared as Gibbon Wildlife Sanctuary in 1997 to protect the western hoolock gibbon and later renamed Hollongapar Gibbon Wildlife Sanctuary after the Hollong tree (Dipterocarpus macrocarpus) and the Hollongapar area. It remains an isolated evergreen forest patch historically surrounded by tea gardens established during the colonial period.

The sanctuary holds conservation and educational significance as the only habitat in India where seven primate species coexist. It is valued for primate research, conservation education and community-based ecotourism, and is locally associated with the Hollong tree which gives the sanctuary its name.