The disastrous impact of poaching and the destruction of the natural habitat of one of the planet's most threatened animals will be made clear tomorrow when the Indian government is told that its remaining tiger population could be as low as 1,300.

The Prime Minister, Manmohan Singh, will be told that drastic action has to be taken against the two forces threatening the big cat's chance of survival. "That size of a population is scientifically not viable," said Valmik Thapar, a tiger expert and member of the National Board of Wildlife, which is due to convene in Delhi for a meeting chaired by Mr Singh. "But in the real world you have to try as hard as you can."

Along with the polar bear, the tiger symbolises perhaps more than any other large creature the majesty and power of the natural world. At the same time the tawdry story of the tiger's decline – not just in India but in other countries where it clings on desperately – is a stark indictment of mankind's apparent inability to preserve the natural habitats on which it depends.

No one knows precisely how many tigers are left in India, home to perhaps 80 per cent of the world's remaining animals and which, at the turn of the 20th century, was estimated to have up to 100,000 animals. It is believed there were about 5,000 at the start of the decade.

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