Manas River tiger, elephant, gaur ("Bos gaurus"), four rare species of golden langur ("Trachypithecus geei"), pygmy hog ("Sus salvanius"), hispid hare ("Caprolagus hispidus"), greater one-horned rhinoceros ("Rhinoceros unicornis") and wild Asiatic water buffalo ("Bubalus arnee"). There are 362 species of birds, out of which four species of hornbills (rufous-necked, wreathed, pied and great Indian) have been recorded. Apart from the Ganges river dolphin ("Platanista gangetica") other aquan species identified in the river are the deep bodied mahseer ("Tor tor"), golden mahseer ("Tor putitora"), and chocolate mahseer or katle ("Acrossocheilus hexangonolepis"). Five thousand people live within the park limits in several villages. Tigers,
Endangered Species Act of 1973 occurred by 1963 to habitat preservation instead of take regulations. A provision was added by Congress in the Land and Water Conservation Fund Act of 1965 that provided money for the "acquisition of land, waters...for the preservation of species of fish and wildlife that are threatened with extinction." The predecessor of the ESA was the Endangered Species Preservation Act of 1966 (P.L. 89-669 ). Passed by Congress, this act permitted the listing of native U.S. animal species as endangered and for limited protections upon those animals. It authorized the Secretary of the Interior to list endangered domestic fish and wildlife