• The last remaining rainforest of Kerala: 

Silent Valley National Park

• Silent valley national park has a core area of: 

89.52 Sq. Km

• Silent Valley National Park is at:

Palakkad

• The Silent Valley area was first explored and investigated in:

1847

• It was explored in 1847 by the botanist:

Robert Wight

• Silent Valley forests were declared as Reserved Forest in:

1914

• The silent valley was established in the year:

1980

• Silent Valley was:

Declared as National Park in 1984 

Formally inaugurated in 1985

• The visitors’ centre for the park is at:

Sairandhri

• The Silent Valley region is locally known as:

Sairandhrivanam

• Sairandhri is the name of Dhrupati or Panchali in Mahabharatha 
• A perennial river passing through the western side of the park is:

Kunthipuzha

• Least polluted river in Kerala:

Kunthipuzha 

• Kunthipuzha merges with:

Bharathapuzha

• Main tributaries of this river are:

Kunthancholapuzha

Karingathodu

Madrimaranthode

Valiaparathodu 

Kummathanthode

• The river that originated from silent valley:

Thuthapuzha 

• The river that was identifies as an ideal site for power generation in 1928-29 the location at Sairandhri is:

Kunthipuzha 

• Proposed hydel power in Kunthipuzha is known as:

Pathrakadavu Power Project 

• The inventory and investigations were carried out in 1958 and a hydel power project was proposed by:

KSEB

• The environmentalist social movement in the 1970s, against Patrakadavu Power Project was known as:

Save Silent Valley Movement

• The congress of IUCN that passed resolution recommending the protection of the lion-tailed macaque in Silent Valley area and Palakkad was:

IUCN Ashkhabad (USSR) Congress, 1978

• In December 1980, government of Kerala declared the Silent Valley area, excluding the hydroelectric project area, as:

National Park

• The Chairman of multi-disciplinary committee, constituted to examine the feasibility of project without any significant ecological damage was: 

Prof. M.G.K. Menon

• Prof. Menon committee submitted its report in: 

1983

• Silent Valley forests were declared as a National Park on:

15^th November, 1984

• Prime minister at the time of declaration of Silent Valley as a National Park:

Indira Gandhi 

• On 7th September 1985, the Silent Valley national park was formally inaugurated by:

Rajiv Gandhi

• The Silent Valley National Park was included in the core area of Nilgiri Biosphere Reserve in:

1^st  September 1986

• On 11th June 2007 a Buffer Zone of 148 Sq. KM added to Silent Valley National Park.
• Chief Minister of Kerala who dedicated the buffer zone to the Nation on 23^rd September 2007:

V S Achuthananthan

• The National Park along with buffer zone is a part of:

Nilambur Elephant Reserve 

• The Park is approachable via. Anaikkatty is:

Silent Valley

• The forests of the Silent Valley National Park harbor some of the most pristine, unique and highly productive forests in the world. 
• In biogeographical sense Silent Valley and adjoining forests represent:

‘Ecological islands’ 

• Ecological Island is the condition which prevailed before anthropogenic activities still exists. 
• The flagship species of the Park is:

Lion tailed macaques

• Scientific name of lion-tailed macaques is: 

Macaca silenus

• Tress that helps in the existence of Lion tailed macaques: 

Vediplavu 

• The indigenous tribal groups that live within park are: 

Irulas, Kurumbas, Mudugas and Kattunaikkars

• Silent Valley is located in the South-western corner of Nilgiris. 
• The highest peak in silent valley is:

Anginda peak (2,383 M)