Explanation:

Silent Valley National Park in Kerala is famous for its populationof Liontailed Macaque, an endangered primate species. Silent Valley National Park is a national park in Kerala, India. It is located in the Nilgiri hills, has a core area of 89.52 km2 whichissurroundedby a buffer zone of 148 km2 Declared national park in 1984, inaugurated in 1985 In 1914, Silent Valley forests were declared as Reserved Forest. During 1921, it came under control of Palakkad Forest Division This national park has some rare species of flora and fauna. This area was explored in 1847 by the botanist Robert Wight. It is located in the rich biodiversity of Nilgiri Biosphere Reserve. Mukurthi peak, the fifth-highest peak in South India, and Angindapeakarealsolocated in its vicinity. Bhavani River, a tributary of Kaveri River, and Kunthipuzha River, atributaryofBharathappuzha river, originate in the vicinity of Silent Valley. The Kadalundi River has also its origin in Silent Valley. 41 mammals, 211 birds, 49 reptiles, 47 amphibians, 12 fishes, 164 butterfliesand400 species of moths are found here. Lion tailed macaques is the flagship species of the Park. The indigenous tribal groups that live within park boundaries includeIrulas, Kurumbas, Mudugas and Kattunaikkars, the ethnic heritage of thesecommunities is well protected. Karimpuzha Wildlife Sanctuary, New Amarambalam Reserved Forest, andNedumkayam Rainforest in Nilambur Taluk of Malappuramdistrict, Attappadi Reserved Forest in Mannarkkad Taluk of Palakkad district, and Mukurthi NationalPark of Nilgiris district, are located around Silent Valley National Park.