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Location Indonesia, Sumatera Barat
Central coordinates 98o 55.00' East  1o 23.00' South
IBA criteria A1, A2, A3
Area 430,300 ha
Altitude 0 - 380m
Year of IBA assessment 2004

Burung Indonesia (Affiliate)

Site description Siberut is the biggest island in Mentawai Islands. This area still widely forested, although logging and shifting agriculture exist.

Key Biodiversity One of endemic bird species, Mentawai Scops-Owl Otus mentawI, in Siberut, Sipora Islands and north and south part of Pagai Islands. The species determines the status of this area as Secondary Endemic Bird Area. Siberut and Mentawai also support 13 endemic bird sub-species (WWF 1980, Holmes 1994)

Non-bird biodiversity: Other biodiversity include Hylobates klossii, Macaca pagensis, Presbytis potenziani dan Simias concolor (WWF 1980, Whitten beaches of this area also nesting sites for Chelonia mydas, Dermochelys coriacea and Eretmochleys imbricata. Crocodylus porosus is also recorded in the coastal area (Colijn 1999)

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Storm's Stork Ciconia stormi resident  2004  present  A1  Endangered 
Wallace's Hawk-eagle Nisaetus nanus resident  2004  present  A1  Vulnerable 
Large Green-pigeon Treron capellei resident  2004  present  A1  Vulnerable 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Siberut National Park 190,500 protected area contained by site 190,500  
Siberut UNESCO-MAB Biosphere Reserve 405,070 protected area contained by site 56,000  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland)   -
Forest Mangrove forest (tropical); Peat swamp forest (tropical)  -
Artificial - terrestrial   -

Land use

Land-use Extent (% of site)
agriculture -
nature conservation and research -

Protection status Declare as Siberut National Park (190500 ha) based on SK Mentan No. 407/Kpts-II/93 and also as a Biosphere Reserve (Anon 1998).

References Anon. 1998. Statistik Perlindungan Hutan dan Pelestarian Alam 1997/1998. Departemen Kehutanan dan Perkebunan, Direktorat Jenderal Perlindungan Hutan dan Pelestarian Alam, Jakarta.Colijn, E.O. 1999. The Indonesian Nature Conservation Database. URL:, D.A. 1994. A review of the land birds of the West Sumatran Islands. Kukila 7(1): 28-46.Kempt, N. (2000). The Birds of Siberut Island, Mentawai, West Sumatra. Kukila 11 (in prep.)Whitten, A.J., Damanik, S.J., Anwar, J. and Hisyam, N. 1987. The Ecology of Sumatra. Gadjah Mada University Press, Yogyakarta.WWF. 1980. Saving Siberut: A conservation master plan. World Wildlife Fund Indonesia Programme.

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Pulau Siberut. Downloaded from on 22/10/2016

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