Gunung Nyiut Nature Reserve

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Summary

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• Northwest Bornean orangutans (Pongo pygmaeus pygmaeus) are present in Gunung Nyiut Nature Reserve.
• The orangutan population size is unknown.
• The orangutan population trend is unknown.
• The total site area is 1,800 km².
• The main reported threats are residential encroachment and illegal logging.
• The main conservation activities have focused on raising awareness in the community and restoring habitats.

Site characteristics

Designated as a nature reserve (Cagar Alam) in 1981, later reaffirmed as a wildlife sanctuary and then nature reserve again, Gunung Nyiut spans approximately 124,500 ha across Bengkayang, Landak, and Sanggau regencies in West Kalimantan, Indonesia. The reserve encompasses a rugged, forested volcanic massif rising to around 1,700 m above sea level (Seksi Konservasi Wilayah III Singkawang 2014).

Table 1. Basic site information for Gunung Nyiut Nature Reserve

Species	Pongo pygmaeus pygmaeus
Area	1,800 km²
Coordinates	Lat: 1.028749 , Lon: 109.934819
Type of site	Protected area (Nature Reserve)
Habitat types	Subtropical/tropical moist lowland forest
Type of governance	Governance by government

Types of sites Governance types Habitat types

Ape status

Table 2. Ape population estimates reported for Gunung Nyiut Nature Reserve

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 pygmaeus

Sampling methods Analytical frameworks

Threats

Table 3. Threats to apes reported for Gunung Nyiut Nature Reserve

Category	Specific threats	Threat level	Description	Year of threat
1 Residential & commercial development	1.1 Residential areas	Present (unknown severity)	The residential areas and old settlements are found around the site (Seksi Konservasi Wilayah III Singkawang 2014).	Ongoing (2014)
5 Biological resource use	5.3 Logging & wood harvesting	Present (unknown severity)	Illegal logging activities were reported (Seksi Konservasi Wilayah III Singkawang 2014).	Ongoing (2014)

Threats

Conservation activities

Table 4. Conservation activities reported for Gunung Nyiut Nature Reserve

Category	Specific activity	Description	Implementing organization(s)	Year of activity
5 Protection & restoration	5.2 Legally protect ape habitat	Gunung Nyiut Nature Reserve has held protected area status since 1982 (Sherman et al. 2022).		1982-Ongoing (2026)
4 Education & awareness	Other	Community outreach and capacity building (Sherman et al. 2022).		Ongoing (2022)
5 Protection & restoration	Other	Habitat management activities were reported to be present (Sherman et al. 2022).		Ongoing (2022)

Conservation activities

References

Sherman, J., Voigt, M., Ancrenaz, M., Wich, S. A., Qomariah, I. N., Lyman, E., Massingham, 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
Seksi Konservasi Wilayah III Singkawang. (2014, June 2). *Cagar Alam Gunung Nyiut* [Blog post]. Blogger. Retrieved June 20, 2025, from https://skw3bksdakalbar.blogspot.com/2014/06/cagar-alam-gunung-nyiut.html

Page created by: Aime Mizero Date: 2025-06-03