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Location Indonesia, Kalimantan Timur
Central coordinates 116o 19.00' East  0o 14.00' South
IBA criteria A1, A3, A4i
Area 400,000 ha
Altitude 0 - 100m
Year of IBA assessment 2004

Burung Indonesia (Affiliate)

Site description Mahakam Tengah is the third biggest swamp in Kalimantan (see Danau Sentarum and Sungai Negara). Biologically, the area is the famous area for Orcaella brevirostris. The area covers 400000 ha, with Lake Jampang as the main lake. Melintang Lake and Semayang Lake has acid water and low fauna diversity.The lakes are very important as buffer area to regulate Mahakam River. The environment of the area is very dynamic and unstable.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Lesser Adjutant Leptoptilos javanicus resident  2004  present  A1, A4i  Vulnerable 
Storm's Stork Ciconia stormi resident  2004  present  A1  Endangered 
White-shouldered Ibis Pseudibis davisoni resident  2004  present  A1  Critically Endangered 
Javan Pond-heron Ardeola speciosa unknown  2004  present  A4i  Least Concern 
Wallace's Hawk-eagle Nisaetus nanus resident  2004  present  A1  Vulnerable 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Muara Kaman Sedulang Nature Reserve 62,500 protected area contained by site 62,500  


IUCN habitat Habitat detail Extent (% of site)
Artificial - terrestrial   -
Forest   -
Wetlands (inland)   -

Land use

Land-use Extent (% of site)
fisheries/aquaculture -
forestry -
agriculture -
other -

Other biodiversity Orcaella brevirostris, Nasalis larvatus, Presbytis frontata, Presbytis rubicunda, Hylobathes muelleri, Neofelis brevirostris, Neofelis nebulosa, Helarctos malayanus, Crocodylus porosus, Crocodylus siamensis and Tomistoma sclegelii (Scott 1989, Momberg,b, Colijn 2000).

Protection status This area includes Muara Kaman which is declared as Nature Reseve based on SK Mentan No. 290/Kpts/Um/5/1976 on 10 May 1976 covering 62500 ha. Beside that, this site also includes some of proposed conservation areas such as Danau Semayang-Danau Melintang Wildlife Sanctuary (69700 ha) and Perairan Sungai Mahakam Nature Reserve (200000 ha) (Anon 1995).

References Anon. 1995. National Conservation Plan for Indonesia, Kalimantan (5A-D). Ministry of Forestry, Directorate General of Forest Protection and Nature Conservation, Jakarta.Anon. 1995. Statistik Perlindungan Hutan dan Pelestarian Alam. Departemen Kehutanan dan Perkebunan, Direktorat Jenderal Perlindungan Hutan dan Pelestarian Alam, Jakarta.Colijn, E.O. 2000. The Indonesian Nature Conservation Database. URL:, F., Jepson, P. and van Noord, H. 1998a. Kalimantan: Biodiversity Assessment. Draft report. WWF Indonesia Project for Intergrated Park Management and Bioregional Planning. Momberg, F., Jepson, P. and van Noord, H. 1998b. Justification and boundary proposals for a new protected area in the Sebuku-Sembakung region, East Kalimantan. Bio-regional Management and Integrated Park Management Project, WWF Indonesia/EPIQ/USAID. Tech. Mem. 1 (2nd ed).Scott, D.A. 1989. A Directory of Asian Wetlands. Compiled for WWF, IUCN, ICBP & IWRB, IUCN, the World Conservation Union.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Lahan Basah Mahakam Tengah. Downloaded from on 25/10/2014

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