His home state or city was not identified, but his Pakistani guides said he is from Texas, and a man by the same name and appearance who features with kills on internet hunting sites is a Dallas mortgage banker.

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The story drew immediate expressions of sorrow and indignation on social media here.

Some Pakistani commentators asked why there was no legal ban on hunting the markhor (Capra falconeri), which is the official national animal. Others suggested that foreign tourists be taken to photograph the exotic goats, not shoot them.

But there is another, more benign, rationale behind allowing Harlan, along with two other Americans, to pay enormous sums to kill three long-horned markhors in northern Pakistan in the past month.

According to Pakistani officials and conservation groups, the practice has actually helped save a rare and endangered species from potential extinction.

For decades, the population of markhors, which are native to the Himalayan ranges of Pakistan, India and Afghanistan, has been dwindling, the result of local poaching for meat, deforestation and logging, military activities, competition with livestock and uncontrolled domestic trophy hunting for their splendid horns. By 2011, there were only an estimated 2,500 markhors left.

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Several years ago, regional officials and conservationists began taking action to save them. India designated five sanctuaries for markhors in the mountainous border state of Jammu and Kashmir.

Pakistan banned all local hunting but started allowing a small number of foreign hunters to shoot 12 male goats per season in “community conservation areas” in Gilgit and elsewhere.

Most of the funds are supposed to be distributed to the impoverished, isolated residents in the goats’ mountainous habitat areas, which get 80 per cent of the fee as well as income as hunting guides and hosts – all extra incentive not to poach the markhors. Government wildlife agencies get 20 per cent.

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The US Fish and Wildlife Service, in an effort to encourage US trophy hunting of markhors as a conservation method, also reclassified the animal as “threatened”, rather than endangered, which allowed hunters to bring back trophies such as their horns, which can grow as long as five feet (1.5 metres).

As a result, the markhor populace had rebounded enough by 2015 that the International Union for the Conservation of Nature upgraded the species from endangered to “near-threatened.”

According to the conservationist website Green Global Travel, the comeback of the markhor is “one of the world’s great but little known conservation success stories.”

Pakistan has a mixed track record on protecting rare and endangered animals.

Officials routinely allow parties of royals from Qatar and Saudi Arabia to shoot internationally protected birds called houbara bustards (Chlamydotis undulata), which Pakistanis are banned from hunting.

In 2014, a Saudi prince reportedly shot more than 2,000 bustards despite having a permit to kill just 100, creating an international uproar.

In Pakistan’s public zoos, neglect and disease have periodically led to the deaths of exotic animals. In the past four years, the main zoo in Islamabad has lost several zebras, lion cubs, an ostrich and deer.

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In the past month, four antelopes called nilgais have died of cold or infections. There are numerous private zoos in Pakistan, where wealthy people keep wild cats and other animals without supervision.

In some other countries, promoting trophy hunting as a conservation tactic has backfired, with some programmes charging high fees but failing to regulate the hunts.

But in Pakistan, the tactic seems to have been unusually successful. Tabarak Ullah, a professional hunter from Gilgit who has guided Harlan and other Americans, said the high-priced permit funds are used for local health and education as well as preserving species.

“This is not just about hunting,” Ullah said in a telephone interview. “The number of animals is increasing, and these foreign hunters are millionaires who go back and tell the world that Pakistan is safe.”

He noted that after the attacks of September 11, 2001, foreign visits to Pakistan fell sharply. “Now, more and more tourists are coming.”

Harlan, for one, appears to see himself as participating in a conservation effort as well as an exotic escapade.

In a video recorded on his recent visit to Gilgit, Harlan was shown climbing a cliff, shooting a male markhor that was sitting next to a young goat, and then high-fiving his local guides.

In another, wearing a feathered local cap and robe, Harlan said he had been “welcomed with open arms” and encouraged other Americans to follow him, calling Pakistan a safe place for tourists.

“This is a perfect example of hunters and villagers coming together for a common goal of game conservation,” he said.