Governments from the thirteen nations wherever tigers nevertheless live intention to agree moves that can double numbers from the endangered enormous cats within 12 years.
The Worldwide Tiger Conservation Forum in St Petersburg will examine proposals on guarding habitat, tackling poaching, and finance.
About three,000 tigers live in the wild - a 40% decline in a very decade.
You'll find warnings that without having significant advances, some populations will disappear within the next 20 years.
5 prime ministers are due to attend the summit, together with China's Wen Jiabao and Vladimir Putin of Russia.
"Here's a species that is literally on the brink of extinction," mentioned Jim Leape, director common of conservation group WWF.
The draft declaration that leaders will take into account acknowledges that "Asia's most iconic animal faces imminent extinction inside wild".
Measures aimed at doubling numbers contain producing core tiger areas "inviolate", cracking down on poaching and smuggling, producing persons informed from the value of tigers, and creating cross-boundary safeguarded areas wherever vital.
A current report by Visitors, the worldwide wildlife trade monitoring organisation, mentioned that human body parts from greater than one,000 tigers had been seized inside very last decade.
But there exists acknowledgement that a few of the smaller nations will have to have help, inside kind of money and expertise.
Earlier this year, scientists calculated the cost of useful worldwide tiger conservation at $80m (£50m) per year, but mentioned only $50m was currently on the table.
Even so, campaigners say monetary considerations shouldn't be an excuse for inaction.
The Environmental Investigation Agency (EIA) factors out that by comparison, it can be believed that "China spent $31bn on the Olympic Video games in 2008, though India spent a whole of $2.6bn on the 2010 Commonwealth Games".
He identified two components missing inside draft deal: measures to cut back the need for tiger skins and bones and human body parts for classic medication, and any discussion of tiger farms.
Each are sensitive subjects in China, wherever it can be believed you will discover much more tigers in captivity than exist globally inside wild.
The Earth Bank has provided substantial backing to moves aimed at saving the tiger, and its president Robert Zoellick also referred towards the must decrease need, specifically in China and Vietnam.
Movie star Jackie Chan not long ago voiced some public service announcements in China asking persons to not use tiger parts, which Mr Zoellick mentioned was enjoying a part in "chaning public attitudes".
Small is unsightly
From a scientific viewpoint, among the most worrying aspects from the tiger's plight is several populations are pretty small - fewer than 100 animals.