Due to heavy poaching and terrorist activities, The park lost its charm but now the park is a UNESCO Natural World Heritage site and known for its rare, endangered and endemic wildlife such as hispid hare, pygmy hog, Assam roofed turtle, hog deer, hoolock gibbons, slow loris, Palm civet, sloth bears, smooth coated otters, golden Cat and wild water buffalo.
Indian elephant has been listed as Endangered and threatened by habitat loss, poaching and degradation. The foothills of Assam is one of the best place where populations are restricted to general areas.
Indian rhinoceros or greater Indian one horned rhinoceros is listed as Vulnerable, only found in 7 sites in northern India and total of 3,555 Indian rhinoceros are estimated to live in the wild.
Wild water buffalo or wild Asian buffalo are live mostly in Assam and individual population in Chhattisgarh. The large bovine is native to the Indian Subcontinent and restricted to in and around Kaziranga and Manas National Park.
Indian bison also called as gaur is the largest and tallest of wild cattle species in India. South Indian states have strongholds of gaur bison and a very good population found in the forest of Manas National Park,
Sambar is a large deer listed as Vulnerable, distributed in much of South Asia and the Indian subcontinent. The sambar are favorite prey of Bengal tigers and Gujarat lions in India.
Manas National Park is also home to hog deers, chitals and barking deers.
Bengal tiger ranks among the biggest wild cats in the world. The sanctuary host healthy population of the endangered Bengal tiger along with Kaziranga National Park.
Indian leopard is widely distributed on the Indian subcontinent, breeding populations have been reported from Kaziranga and Manas National Parks.
Black panther is the beautiful color variant of Indian leopards, reported from densely forested areas of Manas National Park and list of sanctuaries from South India.
Clouded leopard is a very rare and Vulnerable species of wild cat, found only in Himalayan foothills. Manas National Park of Assam is the best place to see Clouded leopard in India, from where 16 individuals were reported through the camera trapped.
The sanctuary is well known to host 300 species of birds, reptiles and 50 species of large and small mammals. Manas Wildlife Sanctuary is home to several rare species of endangered wildlife and some of these wild animals are not found anywhere else in the world like Assam roofed turtle, hispid hare and pygmy hog.
Pygmy hog is the smallest species of piglet, found only in Manas National Park of Assam and listed as critically endangered with total wild population as less than 150.
Hoolock gibbon is the only Ape found in India, native to Northeast Indian state along with south of Brahmaputra and east of the Dibang Rivers.
Assam macaque is endemic to Northeast Indian states, mostly south side of the Brahmaputra river in Assam and Namdapha National Park of Arunachal Pradesh.
Capped langur is the near threatened species of primate, occurs in Assam along the river of Brahmaputra and Manas.
Golden langur only found in a small region of western Assam and listed as most endangered primate species of India.
Assam roofed turtle is listed as Endangered and only found in the Brahmaputra-Meghna drainage in Assam.
Hispid hare is also listed as Endangered, found from Uttar Pradesh to to Assam.
Black giant squirrel also known as Malayan giant squirrel is one of the largest species of tree squirrel found in India, mostly found in the forest of northeast India.
Manas National Park is home to largest population of the endangered Bengal florican in India, also known as Bengal bustard and listed as Critically Endangered bird in India.
Great hornbill also called as the great Indian hornbill is the largest member of hornbill found in the Indian subcontinent. The great Indian hornbills are found in the forests of North eastern region of India and in the Western Ghats.
Wild cats are primarily nocturnal and solitary in nature, most widely distributed in northeastern states of Indian subcontinent. Leopard Cat, Jungle Cat or swamp cat and Asian golden cat three medium sized wild cats, found in the Manas National Park.