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Location Cambodia, Oddar Meanchey,Preah Vihear,Siem Reap
Central coordinates 104o 44.00' East  14o 0.00' North
IBA criteria A1, A4i
Area 533,748 ha
Altitude 36 - 802m
Year of IBA assessment 2003

BirdLife Indochina Programme (BirdLife Direct Action Programme)

Site description The IBA comprises the catchment of the upper Stung Sen river. The vegetation of the IBA is dominated by open deciduous dipterocarp forest (grading into mixed deciduous and semi-evergreen forest in the west), permanent and seasonal wetlands and grasslands.Much of the IBA is a floodplain and in the wet season, is inundated, while in the dry season, water is restricted to a few permanent watercourses (the Stung Sen river and its larger tributaries) and pools. Along these watercourses, semi-evergreen forest and thick bamboo forest are distributed. Much of the IBA is located within Kulen Promtep Wildlife Sanctuary. The IBA supports one of the few breeding colonies of Darter Anhinga melanogaster remaining outside of the Tonle Sap Lake floodplain. In addition, the IBA is an important breeding site for Sarus Crane Grus antigone and Lesser Adjutant Leptoptilos javanicus. Furthermore, a number of other globally threatened and near-threatened species have been recorded at the site, including Giant Ibis (Pseudibis gigantea), White-shouldered Ibis (Pseudibis davisoni), Greater Adjutant (Leptoptilos dubius), Black-necked Stork (Ephippiorhynchus asiaticus) and Grey-headed Fish Eagle (Ichthyophaga ichthyaetus).

Key Biodiversity Other regionally significant bird species: Alexandrine Parakeet, Woolly-necked Stork, Great Slaty Woodpecker.

Non-bird biodiversity: Long-tailed Macaque (Macaca fascicularis), Pig-tailed Macaque (Macaca nemestrina), Slow Loris (Nycticebus coucang), Silvered Langur (Semnopithecus cristatus), Pileated Gibbon (Hylobates pileatus).Asiatic Softshell Turtle (Amyda cartilaginea), Elongated Tortoise (Indotestudo elongata), Yellow-headed Temple Turtle (Hieremys annandalii), Giant Asian Pond Turtle (Heosemys grandis), Malayan Box Turtle (Cuora ambionensis).Gaur (Bos gaurus), Banteng (Bos javanicus), Eld's Deer (Cervus eldii) (Kong Kim Sreng, Ministry of Environment, pers. comm.).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Green Peafowl Pavo muticus resident  2001  common  A1, A3  Endangered 
Greater Adjutant Leptoptilos dubius unknown  2001  uncommon  A1  Endangered 
Lesser Adjutant Leptoptilos javanicus resident  2001  common  A1  Vulnerable 
White-shouldered Ibis Pseudibis davisoni resident  2001  rare  A1  Critically Endangered 
Giant Ibis Thaumatibis gigantea resident  2001  rare  A1, A4i  Critically Endangered 
Greater Spotted Eagle Clanga clanga winter  2001  uncommon  A1  Vulnerable 
Red-headed Vulture Sarcogyps calvus resident  2001  uncommon  A3  Critically Endangered 
Rufous-winged Buzzard Butastur liventer resident  2001  common  A3  Least Concern 
Sarus Crane Antigone antigone resident  2001  common  A1  Vulnerable 
Black-collared Starling Sturnus nigricollis resident  2001  common  A3  Least Concern 

IBA Monitoring

2008 high unfavourable medium
Good - based on reliable and complete / representative data

Agriculture and aquaculture annual & perennial non-timber crops - small-holder farming happening now majority/most of area/population (50-90%) slow but significant deterioration high
Biological resource use hunting & collecting terrestrial animals - intentional use (species being assessed is the target) happening now small area/few individuals (<10%) slow but significant deterioration low
Residential and commercial development housing and urban areas happening now small area/few individuals (<10%) slow but significant deterioration low
Transportation and service corridors roads and railroads happening now small area/few individuals (<10%) no or imperceptible deterioration low

Artificial - terrestrial Rice paddies  0 0 moderate (70-90%) moderate (70-90%) unfavourable
Shrubland   0 0 moderate (70-90%) moderate (70-90%) unfavourable

Most of site (50-90%) covered (including the most critical parts for important bird species)  A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  medium 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Kulen Promtep Wildlife Sanctuary 406,825 protected area overlaps with site 285,000  
Preah Vihear Temple Protected Landscape 4,082 protected area contained by site 5,000  


IUCN habitat Habitat detail Extent (% of site)
Forest Dry deciduous forest (tropical); Lowland evergreen rain forest (tropical); Semi-evergreen rain forest (tropical)  -
Shrubland Secondary scrub  -
Grassland Edaphic grassland; Secondary grassland  -
Wetlands (inland) Ephemeral wetlands; Freshwater lakes and pools; Riverine floodplains; Rivers and streams  -
Artificial - terrestrial Perennial crops, orchards and groves; Rice paddies; Small settlements, rural gardens  -

Land use

Land-use Extent (% of site)
agriculture -
Notes: shifting cultivation
forestry -
military -
nature conservation and research -
other -
Notes: small settlement

Protection status Overlaps with Kulen Prum Tep Wildlife Sanctuary

Further web sources of information 

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

References Barzen, J. (2002) Waterbirds and Wetlands of Northern Cambodia. Bugle.

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Upper Stung Sen Catchment. Downloaded from on 27/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife