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Location Cambodia, Kampong Thom
Central coordinates 104o 31.00' East  12o 36.00' North
IBA criteria A1, A4i
Area 12,390 ha
Altitude 4 - 10m
Year of IBA assessment 2003

BirdLife Indochina Programme (BirdLife Direct Action Programme)

Site description The IBA is centred on the Stung Sen Core Area of Tonle Sap Biosphere Reserve. The IBA is located at the south-eastern end of Tonle Sap Lake, to the north of the point where the Tonle Sap River leaves the lake. The vegetation of the IBA is characterized by botanically unique gallery forest along rivers, dominated by Barringtonia acutangula and Diospyros cambodiana. Although disturbed, this habitat is the most species-rich tall forest around Tonle Sap Lake. The IBA supports an important breeding colony of Darter Anhinga melanogaster, as well as a significant breeding concentration of Grey-headed Fish Eagle (Ichthyophaga ichthyaetus).

Key Biodiversity During the survey, 43 nests of Oriental Darter were observed on 14 November 2001.

Non-bird biodiversity: Long-tailed Macaque (Macaca fascicularis)Asiatic Softshell Turtle (Amyda cartilaginea), Malayan Box Turtle (Cuora ambionensis), Malayan Snail-eating Turtle (Malayemys subtrijuga), Yellow-headed Temple Turtle (Hieremys annandalii), [Siamese Crocodile (Crocodylus siamensis)].

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Lesser Adjutant Leptoptilos javanicus resident  2001  common  A1  Vulnerable 
Spot-billed Pelican Pelecanus philippensis resident  2001  common  A1  Near Threatened 
Oriental Darter Anhinga melanogaster resident  2001  abundant  A4i  Near Threatened 

IBA Monitoring

2008 medium unfavourable low

Agriculture and aquaculture annual & perennial non-timber crops - small-holder farming happening now some of area/population (10-49%) slow but significant deterioration medium
Biological resource use fishing & harvesting aquatic resources - unintentional effects: subsistence/small scale happening now some of area/population (10-49%) slow but significant deterioration medium
Biological resource use hunting & collecting terrestrial animals - intentional use (species being assessed is the target) happening now some of area/population (10-49%) slow but significant deterioration medium

Grassland   0 0 moderate (70-90%) moderate (70-90%) unfavourable

Most of site (50-90%) covered (including the most critical parts for important bird species)  No management plan exists but the management planning process has begun  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Stung Sen Multiple Use Management Area - Core Area 6,355 protected area contained by site 6,355  
Tonle Sap UNESCO-MAB Biosphere Reserve 1,481,257 protected area contained by site 6,355  


IUCN habitat Habitat detail Extent (% of site)
Grassland Edaphic grassland; Secondary grassland  -
Wetlands (inland) Ephemeral wetlands; Freshwater lakes and pools; Permanent swamps; Rivers and streams  -

Land use

Land-use Extent (% of site)
urban/industrial/transport -
Notes: small settlement
fisheries/aquaculture -

Protection status Stung Sen Core Area, Tonle Sap Biosphere Reserve contains the IBA

Further web sources of information 

Site account from Directory of Important Bird Areas in Cambodia: key sites for conservation (Seng Kim Hout 2003)

References Document nameGoes F. and Hong C. (2002). The status and conservation of large waterbirds on the Tonle Sap Great Lake, Cambodia 2000-2001. Wildlife Conservation Society, Phnom Penh.Pech Bunnat and Long Kheng (2001). Survey on Oriental Darter colony and reptiles. Unpublished report, Wildlife Conservation Society, Cambodia.McDonald, A., Pech Bunnat, Phauk Virak and Leen Bunton (1997) Plant Communities of the Tonle Sap Floodplain. UNESCO, Phnom Penh.Mundkur, T., Carr, P., Sun Hean and Chhim Somean 1995. Surveys for large waterbirds in Cambodia. March - April 1994. Cambridge, UK: IUCN/SSC.Carr, P. (1993) Bird observations from the southern reaches of the Tonle Sap Lake in central Cambodia from 9th April to 16th June. Unpublished.Carr, P. (1994). Cambodia, the last refuge for rare and endangered waterfowl in Southeast Asia. Sea Swallow 43: 35-37.

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lower Stung Sen. Downloaded from on 23/10/2016

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