CHAINED to a wall and lying on a dirty mattress with a full face of make-up, Pony the orangutan waited for her next client.

Men working in the nearby palm oil farm in Borneo would come into the brothel and could pay a couple of quid to have sex with a prostitute, or, shockingly, with her.

8 Pony was chained up used as a sex slave for six years Credit: Borneo Orangutan Survival Foundation

Knowing what was expected, Pony would gyrate her hips when a punter came to the door before being raped by men twice the size of her who paid her owner for the experience.

Stolen from her mum as a baby, the gentle ape’s entire body was shaved every other day, leaving her skin irritated, covered in sores and prone to mosquito bites - and she was taught how to perform sex acts.

The threat to the existence of orangutans is an issue currently thrust to the forefront, with Iceland’s now-banned Christmas advert highlighting the impact the non-sustainable palm oil trade is having on their lowland jungle habitat in Borneo and Sumatra.

Here, The Sun Online speaks to the Orangutan experts who helped rescue and look after Pony, and investigates the illegal ape trafficking trade - where primates are sold for up to £10,000 via the black market and are even bought through social media sites.

8 She's since been rescued and rehabilitated Credit: Borneo Orangutan Survival Foundation

Covered in abscesses in 'brothel village'

No one knows exactly how long Pony was forced to work as a prostitute before being rescued from a brothel in Indonesia.

It's taken over a decade for Pony to recover from the unimaginable cruelty she suffered at the “brothel” village - a destination popular with local farm workers who used prostitutes.

Chained to a bed, men could choose to pay to have sex with her - and she was shaved and made to wear perfume and jewellery.

8 Pony being released onto the island Credit: Borneo Orangutan Survival Foundation

Former teacher Michelle Desilets started volunteering looking after orphaned orangutans in Borneo in 1994 and was director of Borneo Orangutan Survival Foundation UK when Pony was rescued.

She told The Sun Online: “It was horrifying. She was a sex slave - it was grotesque. She was covered in abscesses, and they put make-up and earrings on her.

“She must have been in so much pain. It was horrible to think about how terrified she must have been.”

Danish conservationist Lone Droscher-Nielsen was part of the team who rescued Pony in 2003.

8 Michelle surrounded by baby orangutans in the sanctuary Credit: Borneo Orangutan Survival Foundation

Speaking to The Sun Online she said: “When I found that she was used for prostitution and not just a pet I was horrified.

“Perhaps in my naivety I had never thought it humanly possible to do such a thing to an animal.”

35 armed police to the rescue

The rescue wasn’t straightforward, with the local community extremely reluctant to let Pony, who was a good source of income, go.

In the end it took 35 armed policemen to get the villagers to hand over Pony.

Michelle says: “They were threatened with guns and knives.

8 Lone was part of the team that rescued Pony Credit: Borneo Orangutan Survival Foundation

“The madam cried bitterly when Pony was taken away.”

At the point of rescue, as well as the inevitable psychological trauma, Pony was in a horrific condition physically. Her skin was infected, and she couldn’t stop scratching.

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Michelle says: “I met Pony shortly after she was rescued. Her resilience is amazing. Despite the trauma, she maintained a dignity, and sense of humour. She had the best personality, and learned how to trust very quickly, despite what she’d been through.”

Isolated from men

Experts think she'd been taken from her mother as an infant - as most orangutans usually stay with their mum for the first seven to 11 years of their lives - and they estimated her to be around six years old.

8 Pony is now free Credit: Borneo Orangutan Survival Foundation

Lone explains: “The first baby steps where to make her trust us in her new home.

“We tried to keep men away from her enclosure as she was afraid of them.

“After her quarantine we would take her into the forest with the younger orangutans, still women only.

“She slowly recovered and male carers were slowly introduced to her. She didn't seem to be afraid of them anymore and she was happy with any company she could have. Eventually she was moved to one of the islands.”

8 Pony suffered years of abuse Credit: Borneo Orangutan Survival Foundation

Sadly, due to her lack of survival skills and the fact she’d spent too much time in human captivity, she’ll never be released back into the wild.

However now, 15 years on, she is in good health, and lives in an enclosure in Nyaru Menteng Rehabilitation Centre with seven other orangutans - and has learned how to make nests and forage.

Trafficked apes for £10k on social media

While Pony’s situation is very rare, tragically factors including deforestation and illegal trafficking of these primates - who can weigh up to 21st and live up to 50 years old - mean they may soon be extinct.

8 Lone with a baby at the sanctuary Credit: Borneo Orangutan Survival Foundation

It is thought around 1,000 orangutans - whose name literally translates into English as “person of the forest” - are killed every year so their babies can be sold on the black market. For every one orangutan baby sold, it is thought at least four others are killed.

Disturbingly, it’s all too easy to sell or buy an ape like Pony.

Reports suggest the illegal wildlife trade is booming, thanks to social media platforms such as Instagram and Facebook.

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Just last year two baby orangutans - 8 month old female Korwas and one year old male Gakkum were rescued, found in tiny cages about to be transported to their buyer after reportedly being sold through social media.

Michelle adds: “There’s nothing cuter than a baby orangutan. That’s their flaw - they’re irresistible as babies so they fetch a lot of money and celebrities like Paris Hilton have been pictured posing with them on Instagram.

“However, they don’t make good pets - they become unmanageable.”