It was declared a National Park in 1983. In the same year, it was also declared as a Tiger Reserve.

Geography:

● It lies at the international border between India and Myanmar in the state of Arunachal Pradesh.

● Namdapha is surrounded by the Patkai hills to the south and south-east and by the Himalaya in the north.

● Namdapha is in fact the name of a river originating in the Park and it meets Noa-Dehing river. The Noa-Dehing river, is a tributary of the Brahmaputra and flows in a North-South direction in the middle of the National Park.

● Climate: Enjoys the sub-tropical climate. The mountainous part has a mountain type of climate while the low lying plains and valleys experience tropical climate.

● Vegetation: The vegetation is characteristic of tropical evergreen forests (Tropical Rain Forests).

Fauna:

● It is the only park in the World to have the four species of big cat namely the Tiger, Leopard, Snow Leopard and Clouded Leopard.

● A number of primate species such as Assamese macaque, pig-tailed macaque, stump-tailed macaque.

● Hoolock Gibbons, the only ‘ape’ species found in India is found in this National Park.

● Of the many other important animals are the elephants, black bear, Indian Bison, and a variety of arboreal animals.

● Among the bird species, most notable are the White winged Wood Ducks, a rare and endangered species. It is also home to 5 out of 9 species of Hornbill including the great Indian hornbill.