SWD’s dubious plan to release two orphaned Sepilok orangutans

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Photo: two young orangutans grab a tourist at the SORC

Based on an October 2019 Borneo Post news report, it appears that the Sabah Wildlife Department (SWD) is planning to move two “rehabilitated” yet humanised (over habituation to, and/or overdependency on, humans) orangutans, Rosa and Ceria, from the Sepilok Orangutan Rehabilitation Centre (SORC) to release them into the Tabin Wildlife Reserve (TWR), a forest in eastern Sabah.

Both Rosa and Ceria are reported to have arrived at the SORC for forest-release rehabilitation at age one, as orphans. As of 2020, Rosa is 19 years old while Ceria is 14.

In the area of orangutan rehabilitation, it is not typical for orangutans rescued in early infancy to take 10-15 years to be rehabilitated and released into a forest as adults.

Rosa has been labelled as often seen at the centre (instead of the forest adjacent to SORC) while she waited to steal from “her next victim”. She gave birth to her baby in captivity at SORC in May 2018. An alarming YouTube video shows Rosa and her baby on a tourist boardwalk near the SORC (they should be in a forest). We invite SWD to comment if Rosa’s infant is still in her care.

The 2016, 8-part Animal Planet documentary series about the SORC, Meet the Orangutans, labelled Rosa as “head and shoulders above the rest [of orangutans at the SORC]” when it came to stealing items at the centre. This behaviour indicates that Rosa has become humanised.

Ceria is known among the SORC staff as a physical risk to them and tourists. We confirm that he attacked a tourist in 2017. The Meet the Orangutans documentary revealed that Ceria was attacked and injured by a pack of feral dogs near the centre.

We have discovered that the founder of a British orangutan organisation which supports the SORC privately expressed concern that significant problems could arise if the media found out about the behaviour of several (humanised) SORC orangutans. These male apes – Ceria, Sen, Mowgly and Poogle – are apparently a physical risk to tourists and staff at the centre. Sources also revealed that the centre was close to getting sued by a tour company for safety negligence caused by a humanised orangutan.


Below are statements which have been made by British organisation Orangutan Appeal UK regarding Ceria’s behaviour.

– … causing mischief whenever possible! Keep a safe distance from Ceria if you spot him1
– … Bad boy Ceria has been hanging around the outdoor nursery again throwing rocks this time and now Kala has started to copy him!2
He’s supremely interested in the human goings-on at the Centre and studies visitors and staff intensely, waiting for the next opportunity to wreak havoc3
– … he and a gang of other adolescent orangutans raided the Centre’s café… Ceria managed to open the ice-cream freezer and grab some treats4
– … one of the rangers was in the small wooden boat on the lake cleaning debris away, when Ceria came up to the shoreline, untied the rope and then tried to haul the boat in whilst the ranger was frantically trying to keep himself afloat5


It is no surprise that a source informed us that Ceria is now kept in a cage at the SORC, likely humanising him even more as he will be dependant on staff to care for him. We were also informed that Sen and is now also kept in a cage at the SORC.

All that is stated above undoubtedly raises doubts about the real reasons for the SWD wanting to release Ceria and Rosa into the TWR.

Ceria’s behaviour is extremely alarming and he does not seem to be a viable and safe forest-release candidate any longer. Both Ceria and Rosa should now be living independently in a forest, away from humans, but the unsustainable and unethical tourism and hands-on volunteering* practices at the SORC cause humanisation among orangutans at the SORC, putting the apes’ future in jeopardy.

Humanisation can affect orangutans’ ability to build nests and forage in a forest. It can also cause the apes to lose their fear of humans and makes them far too comfortable with human presence. Read more about the effect of humanisation on orangutans here, and here.

On 22 January 2020 we wrote to the SWD to ask that no SORC orangutan is released into the TWR without the centre first fulfilling these two demands:

– Present its plans for the release of Ceria and any other SORC orangutan into the TWR to the IUCN/SSC Primate Specialist Group. This should include available data which led the department deciding to move the orangutans to the TWR.

– Inform how long it plans to conduct Post-release Monitoring and publish the monitoring data (as recommended by the IUCN), or at least submitting it to the IUCN/SSC Primate Specialist Group. The IUCN recommends monitoring be done ideally for at least a year.

The department has yet to respond.

If Ceria and Rosa are released into the TWR without the two demands being met members of the public and the media may mistakenly believe that the release is an immediate conservation success. A release can only be called a success if an orangutan is proven to be self-reliant in a forest after release – building nests and foraging efficiently while steering clear of humans. This can only be determined through Post-release Monitoring.

Previous releases of a humanised orangutan called Tiger unsurprisingly failed and his fate is now in doubt once more. In September 2019 the SWD once again said they plan to release Tiger. There should be full transparency in plans for his future. release. Read more about Tiger here.


Photo: Tiger in a cage at the SORC

We welcome the SWD and the KePKAS Ministry to respond to this article.


*The British company which ran the unethical volunteering programme at the SORC ceased trading in February 2020. However, neither the SWD nor the Sabah environment ministry has confirmed that the programme will not continue. Read more here.



1 https://www.orangutan-appeal.org.uk/about-us/meet-the-orangutans

2 https://go.aws/3bu9kF8

3 https://go.aws/2xXPC6U


5 https://go.aws/3bu9kF8