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Location Cambodia, Kampong Chhnang,Pursat
Central coordinates 104o 25.00' East  12o 32.00' North
IBA criteria A1, A4i
Area 2,357 ha
Altitude 4 - 8m
Year of IBA assessment 2003

BirdLife Indochina Programme (BirdLife Direct Action Programme)

Site description The IBA comprises Chhnuk Tru, an inland delta formed where the Tonle Sap and Stung Sen Rivers meet the Tonle Sap Lake. During the dry season, the IBA contains large areas of exposed mudflat, bisected by a complex of small, medium and large waterways. During the dry season (March to May), the IBA is important for large numbers of migratory shorebirds, although more survey work needs to be carried out to establish the patterns of use of the IBA by migratory shorebirds and feeding large waterbirds from the colonies to the northwest. The area also regularly supports more than 1% of the Asian biogeographic population of Whiskered Tern Chlidonias hybridus. The IBA is situated within Tonle Sap Multiple Use Area, designated under the 1993 Royal Decree on Protected Areas, and Tonle Sap Biosphere Reserve.

Key Biodiversity The site also supports many shorebird species such as Asiatic Golden Plover, Little-ringed Plover, Kentish Plover, Greater sand Plover, Bar-tailed Godwit, Common Greenshank, Green Sandpiper, Wood Sandpiper, Common Sandpiper, Curlew Sandpiper.

Non-bird biodiversity: 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
Greater Adjutant Leptoptilos dubius non-breeding  2002  rare  A1  Endangered 
Lesser Adjutant Leptoptilos javanicus breeding  2002  uncommon  A1  Vulnerable 
Spot-billed Pelican Pelecanus philippensis non-breeding  2002  rare  A1  Near Threatened 
Whiskered Tern Chlidonias hybrida non-breeding  2002  common  A4i  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Tonle Sap Biosphere Multiple Use Management Area 322,270 protected area contains site 2,357  


IUCN habitat Habitat detail Extent (% of site)
Shrubland Secondary scrub  -
Wetlands (inland) Permanent swamps  -

Land use

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

Further web sources of information 

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

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Chhnuk Tru. Downloaded from on 24/10/2016

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