隸屬印度政府的國家老虎保育委員會，採取透過獨立研究機構－印度野生生物基金會（Wildlife Institute of India），來對老虎數量進行科學評估，世界自然基金會(WWF)對其深表贊同。
India has lost more than half of its tiger population in the past five years, a new government tiger census shows. Crunching the numbers for its 2006-2007 census, the National Tiger Conservation Authority estimates the population at between 1,165 and 1,657 tigers.
At the last census in 2002, observers counted 3,642 tigers across India.
The government report, "State of tiger, co-predators and prey in India," released in New Delhi on Tuesday, said there has been an overall loss in India's tiger population.
WWF calls the census, "the most reliable picture yet of the state of the Indian tiger."
"This is the most complete census ever undertaken of tigers in India, or of wild tigers anywhere else in the world," said the global conservation organization.
Today, the state of Andhra Pradesh has only 95 tigers, when in 2002 there were 192 tigers in the state.
Most tiger range Indian states have lost at least half their tigers since 2002, and Orissa has lost even more - only 45 tigers remain out of the 173 that were counted then.
"These estimates are distressingly low," said Sujoy Banerjee, director, species conservation, WWF-India. "But at least we now have better habitat and population data than ever before and we can intervene more strategically and more effectively to help ensure that tiger populations recover, and that India can maintain its national symbol."
"It is of great concern that some reserves appear to have lost their tigers, pointing to a clear need to upgrade and maintain the general level of protection offered in reserves," said Banerjee, "but apart from this, the matter of real concern is the tigers outside the tiger reserves, national parks and sanctuaries."
"If attention is not paid to their conservation we will lose them altogether," he warned. "The continued threat from poaching and illegal trade in tiger parts must be met with enhanced enforcement efforts."
WWF complimented the Indian government’s National Tiger Conservation Authority for its decision to undertake a scientific assessment of tiger population through an independent research agency, the Wildlife Institute of India.
"It is also amply clear," said Banerjee, "that the tiger numbers are at the threshold, and if the numbers go down any further, then recovery may not be possible at all."
"The time has come for the government and all other institutions and agencies to show serious commitment to tiger conservation if at all we wish to see tiger in the wild in India in the future."