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[[Asia]] > [[Indonesia]] > [[Kehje Sewen]]

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__TOC__
= Summary =

<div style='float: right'>{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers=OpenStreetMap,OpenTopoMap|1.3950, 116.2450~[[Kehje Sewen]]~''Pongo pygmaeus morio''}}</div>
* Northeast Bornean orangutans (''Pongo pygmaeus morio'') are present in Kehje Sewen.
* The orangutan population size is unknown.
* The orangutan population trend is unknown.
* The site has a total size of 864.5 km².
* The main reported threats include logging activities and human wildlife conflict.
* Conservation efforts have primarily focused on community education, natural habitat restoration, mitigation of human–wildlife conflicts, regular patrols, and the rehabilitation and translocation of orangutans.

= Site characteristics =

The Kehje Sewen Ecosystem Restoration Forest in East Kalimantan, designated as an IUPHHK-RE (Izin Usaha Pemanfaatan Hasil Hutan Kayu – Restorasi Ekosistem) area, serves as a secure and permanent habitat for rehabilitated orangutans to establish new wild populations. Since 2012, the Restoration of Orangutan Habitat Indonesia (RHOI) has released 75 orangutans at forest camp sites within the area. Continuous post-release monitoring is essential to assess how well the orangutans adapt to their new environment ([[#R00847|Bani et al. 2018]]).

'''Table 1. Basic site information for Kehje Sewen'''
{| border="1" cellpadding="5" cellspacing="0" class="Site_characteristics-table"
|Species
|''Pongo pygmaeus morio''
|-
|Area
|864.5 km²
|-
|Coordinates
|Lat: 1.3950 , Lon:  116.2450
|-
|Type of site
|Non-protected area (Ecosystem restoration concession)
|-
|Habitat types
|Subtropical/tropical moist lowland forest
|-
|Type of governance
|Private governance
|}

[[Types of sites]] [[Governance types]] [[Habitat types]] 
= Ape status =



'''Table 2. Ape population estimates reported for Kehje Sewen'''
{| border="1" cellpadding="5" cellspacing="0" class="Ape_status-table"
!Species
!Year
!Occurrence
!Encounter or vistation rate (nests/km; ind/day)
!Density estimate [ind./ km²] (95% CI)
!Abundance estimate (95% CI)
!Survey area
!Sampling method
!Analytical framework
!Source
!Comments
!A.P.E.S. database ID
|-
|''Pongo pygmaeus morio''
|
|
|
|
|
|
|
|
|
|
|
|}

[[Sampling methods]] [[Analytical frameworks]] 
= Threats =



'''Table 3. Threats to apes reported for Kehje Sewen'''
{| border="1" cellpadding="5" cellspacing="0" class="Threats-table"
!Category
!Specific threats
!Threat level
!Description
!Year of threat
|-
|5 Biological resource use
|5.1.5 Persecution/human wildlife conflict
|Present (unknown severity)
|Human wildlife conflict reported, but details are unknown ([[#R00853|Sherman et al. 2022]]).
|Ongoing (2022)
|-
|5 Biological resource use
|5.3 Logging & wood harvesting
|Present (unknown severity)
|The Kehje Sewen Ecosystem Restoration Forest is reported to have been disturbed by logging activity ([[#R00847|Bani et al. 2018]]).
|Ongoing (2018)
|}

[[Threats]] 
= Conservation activities =



'''Table 4. Conservation activities reported for Kehje Sewen'''
{| border="1" cellpadding="5" cellspacing="0" class="Conservation_activities-table"
!Category
!Specific activity
!Description
!Implementing organization(s)
!Year of activity
|-
|2 Counter-wildlife crime
|2.3 Conduct regular anti-poaching patrols
|The Ecosystem Restoration and Forest Protection Team, known as RE-PPHK, conducts patrols to secure forest boundaries, monitor illegal activities and access points, and take immediate action to detect and prevent forest fires ([[#R00849|Borneo Orangutan Survival Australia, 2025]]).
|Bornean Orangutan Survival Foundation
|Ongoing (2025)
|-
|4 Education & awareness
|4.1 Educate local communities about apes and sustainable use
|Community outreach and capacity building activities were reported ([[#R00853|Sherman et al. 2022]], BOSF 2025).
|Bornean Orangutan Survival Foundation
|2010-Ongoing (2025)
|-
|5 Protection & restoration
|5.6 Habitat restoration
|Habitat management activities and restoration program were reported to be present, Additionally, the ecosystem restoration concession include planting food and nesting tree species ([[#R00853|Sherman et al. 2022]], [[#R00850|Borneo Orangutan Survival Foundation 2024]]).
|PT. Restorasi Habitat Orangutan Indonesia (PT. RHOI), Bornean Orangutan Survival Foundation
|2010-Ongoing (2024)
|-
|6 Species management
|6.7 Translocate (capture & release) wild apes from human impacted sites to natural habitat elsewhere
|Kehje Sewen is one of three release sites managed by the BOS Foundation, where orangutans are transported and released (BOSF 2025).
|Bornean Orangutan Survival Foundation
|2012-Ongoing (2025)
|-
|6 Species management
|6.8 Reintroduction of apes (captively-bred or rehabilitated indviduals)
|The reintroduction of orangutans in Kehje Sewen started in 2012 (Borneo Orangutan Survival Foundation, 2023).
|Bornean Orangutan Survival Foundation
|2012-Ongoing (2025)
|-
|2 Counter-wildlife crime
|Other
|Mitigation of human wildlife conflict activities were reported, but details are unknown ([[#R00853|Sherman et al. 2022]]).
|
|2010-Ongoing (2022)
|}

[[Conservation activities]] 
= Challenges =



= Enablers =



= Research activities =

Research activities were reported to be present in the Kehje Sewen ([[#R00853|Sherman et al. 2022]]).

= Documented behaviours =



= Exposure to climate change impacts =



= External links =



= References =

<span id="R00847"></span>Bani, S. N., Perwitasari-Farajallah, D., Atmoko, S. S. U., & Sihite, J. (2018). Adaptation behavior of Bornean Orangutan (Pongo pygmaeus morio) reintroduction in Kehje Sewen Forest, East Kalimantan, Indonesia. ''Biodiversitas Journal of Biological Diversity'', 19(3), 989-996. [https://doi.org/10.13057/biodiv/d190330 doi:10.13057/biodiv/d190330]

<span id="R00848"></span>Borneo Orangutan Survival (BOS) Foundation. (2023, March 12). Remarkable collaborative effort: 12 orangutans flown to freedom in Central and East Kalimantan [Press release]. Borneo Orangutan Survival Foundation. Retrieved June 24, 2025, from https://www.orangutan.or.id/remarkable-collaborative-effort-12-orangutans-flown-to-freedom-in-central-and-east-kalimantan

<span id="R00849"></span>Borneo Orangutan Survival Australia. (2025, June 10). Guardians of the Forest [Web page]. Retrieved June 24, 2025, from https://www.orangutans.com.au/guardians-of-the-forest/

<span id="R00850"></span>Borneo Orangutan Survival Foundation. (2024). The journey of reforestation at Kehje Sewen Forest. https://www.orangutan.or.id/the-journey-of-reforestation-at-kehje-sewen-forest

<span id="R00851"></span>Orangutan Foundation International. (2025). Community development & education. https://www.orangutan.or.id/community-development-education

<span id="R00852"></span>Orangutan Foundation International. (n.d.). Orangutan reintroduction. https://www.orangutan.or.id/orangutan-reintroduction

<span id="R00853"></span>Sherman, J., Voigt, M., Ancrenaz, M., Wich, S. A., Qomariah, I. N., Lyman, E., …, & Meijaard, E. (2022). Orangutan killing and trade in Indonesia: Wildlife crime, enforcement, and deterrence patterns. ''Biological Conservation'', 276, 109744. [https://doi.org/10.1016/j.biocon.2022.109744 doi:10.1016/j.biocon.2022.109744]



'''Page created by: '''Aime Mizero''' Date:''' 2025-05-30