The name of the park is originated from theManas River. The Manas river is a major tributary ofBrahmaputra River, which passes through the heart of the national park.
The Manas Wildlife Sanctuary was declared a sanctuary on 1 October 1928 with an area of 391 km2 (151 sq mi). Prior to the declaration of the sanctuary, the area had two reserve forests, called Manas Reserve Forest and North Kamrup Reserve Forest.[6] It was used by theCooch Behar royal family and Raja ofGauripur as a hunting reserve.[citation needed] It was declared aWorld Heritage Site in 1985 by UNESCO.[7] Manas Biosphere Reserve was declared in 1989. Kahitama R.F., Kokilabari R.F., and Panbari R.F. were added in the year 1990 to form Manas National Park.[6] In 1992, UNESCO declared it as a world heritage site in danger[7] due to heavypoaching and terrorist activities.[citation needed] On 25 February 2008, the area was increased to 500 km2 (190 sq mi).[citation needed] On 21 June 2011, it was removed from theList of World Heritage in Danger and was commended for its efforts in preservation.[7]
There is only one forest village, Pagrang, in the core of the national park. Apart from this village 56 more villages surround the park. Many more fringe villages are directly or indirectly dependent on the park.
Political Geography: The park area falls in the following districts: Chirang, Baksa in the autonomous territorial region, i.e.BTR in the state ofAssam in India.
A view of mountains from the park
The park is divided into three ranges. The western range is based at Panbari, the central atBansbari nearBarpeta Road, and the eastern at Bhuiyapara nearPathsala. The ranges are not well connected; while two major rivers need to be forded in going from the centre to the Panbari, there is a rough trail (theDaimari road) connecting the centre to the eastern range. Most visitors come to Bansbari and then spend some time inside the forest at Mathanguri on theManas river at the Bhutan border.
Physical Geography: Manas is located in the foothills of theEastern Himalaya and is densely forested. The Manas river flows through the west of the park and is the main river within it. It is a major tributary of Brahmaputra river and splits into two separate rivers, theBwrsi andBholkaduba as it reaches the plains. Five other smaller rivers also flow through the national park which lies on a wide, low-lying alluvial terrace spreading out below the foothills of the outer Himalaya. The Manas river also serves as an international border dividingIndia andBhutan. The bedrock of the savanna area in the north of the park is made up of limestone and sandstone, whereas the grasslands in the south of the park stand on deep deposits of fine alluvium. The combination of Sub-Himalayan Bhabar Terai formation along with the riverine succession continuing up to Sub-Himalayan mountain forest makes it one of the richest areas of biodiversity in the world. The park is 950 square kilometres (370 sq mi) in the area and is situated at an altitude of 61–110 metres (200–361 ft) above mean sea level.
Climate: The minimum temperature is around 15 °C (59 °F) and the maximum temperature is around 37 °C (99 °F).
Heavy rainfall occurs between May and September. The annual average rainfall is around 333 centimetres (131 in).
Sub-Himalayan light alluvial semi-evergreen forests in the northern parts.
East Himalayan mixed moist and dry deciduous forests.
Low alluvial savanna woodland, and
Assam Valley semi-evergreen alluvial grasslands which cover almost 50% of the park.
Much of the riverine dry deciduous forest is at an early successional stage. It is replaced by moist deciduous forest away from water courses, which is succeeded by semi-evergreen climax forest in the northern part of the park. A total of 543 plants species have been recorded from the core zone. Of these, 374 species are dicotyledons (including 89 trees), 139 species monocotyledons and 30 arepteridophytes andgymnosperms.
The sanctuary has recorded 55 species of mammals, 380 species of birds, 50 of reptiles, and 3 species of amphibians. Out of these wildlife, 21 mammals are India's Schedule I mammals and 31 of them are threatened.
The park is well known for species of rare and endangered wildlife that are not found anywhere else in the world such as theAssam roofed turtle,hispid hare,golden langur andpygmy hog. The Durrell Wildlife Conservation Trust has been involved in released pygmy hogs into the wild. In 2024, 9 pygmy hogs were released into the wild in the park increasing its population in Manas to 63.[10]
^Wikramanayake, Eric; Eric Dinerstein; Colby J. Loucks; et al. (2002).Terrestrial Ecoregions of the Indo-Pacific: a Conservation Assessment. Island Press;Washington, DC. pp. 300-301
^Chamundeeswari, D.; Vasantha, J.; Gopalakrishnan, S.; Sukumar, E. (2004). "Anti-inflammatory and antinociceptive activities of Trewia polycarpa roots".Fitoterapia.75 (7–8):740–744.doi:10.1016/j.fitote.2004.07.001.PMID15567254.