The Asiatic cheetah, an equally fast cousin of the African cat, once ranged from the Red Sea to India, but its numbers shrunk over the past century to the point that it is now hanging on by a thin thread, an estimated 50 to 70 animals remaining in Iran, mostly in the east of the country.
That's down from as many as 400 in the 1990s, its numbers plummeting due to poaching, the hunting of its main prey, gazelles and encroachment on its habitat.
At the reserve, rangers are caring for a male cheetah named Koushki, rescued by a local resident who bought it as a cub from a hunter who killed its mother around seven years ago, said Morteza Eslami Dehkordi, the director of Iranian Cheetah Society.
"Since he was interested in environment protection, he bought the cub from him and handed it to the Department of Environment," he said.
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Rangers have been equipped with night vision goggles and cameras have been set up around cheetah habitats to watch for any threat. They have also been fitting cheetahs with UN-supplied GPS collars so their movements can be tracked.
Authorities built shelters in arid areas where the cats can have access to water. They've also reached out to nearby communities, training them how to deal with cheetahs and promising compensation for livestock killed by cheetahs to prevent shepherds or farmers from hunting them.
Once known as "hunting leopards," Asiatic cheetahs were traditionally trained for emperors and kings in Iran and India to hunt gazelles. They disappeared across the Middle East about 100 years ago, although there were sightings in Saudi Arabia until the 1950s.
They vanished in India in 1947 and ranged in Central Asia as far as Kazakhstan up to the 1980s. Gary Lewis, with the UN Development Program, said the dropping numbers in Iran are alarming.