The elusive snow leopard - long considered endangered - has been upgraded to "vulnerable", though conservations warned the new classification does not mean they are safe.
The animals still face serious challenges including poaching and loss of prey in their high Himalayan habitat.
"The species still faces 'a high risk of extinction in the wild' and is likely still declining - just not at the rate previously thought," said Tom McCarthy, head of the snow leopard program at the big cat conservation group Panthera.
Snow leopards had been listed as endangered since 1972.
The reclassification announced on Thursday by the International Union for Conservation of Nature, or IUCN, followed a three-year assessment that determined there are not fewer than 2500 mature snow leopards in the wild, and that their numbers are not in steep decline - the two criteria for being considered "endangered".
Using improved methods for assessing the cats' population, experts estimated about 4000 live in the wild, though there could be as many as 10,000.
Scientists have managed to survey only a small fraction of the animal's high-mountain range, an area covering some 1.8 million sq/km crossing into 12 countries in Asia.
Doing the research "is difficult," said Peter Zahler, coordinator of the snow leopard program at the Willdife Conservation Society, who was involved in the multi-agency team's assessment. "It involves an enormous amount of work in some of the most remote and inhospitable regions of the world."
New technologies, including camera traps and satellite collaring, are "giving us better information about where snow leopards are and how far they range," he said.
Some positive developments included an increase in the number of protected areas, as well as stepped-up efforts by local communities to protect the animals from poachers.
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