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Location Laos, Bolikhamxai
Central coordinates 105o 1.00' East  18o 34.00' North
IBA criteria A1, A2, A3
Area 81,220 ha
Altitude 500 - 1,800m
Year of IBA assessment 2003

BirdLife Indochina Programme (Country programme)



Site description The IBA is located inside Nam Chat/Nam Pan Provincial Protected Area (referred to as Nam Theun Extension proposed NBCA in many published sources), in northern Lao P.D.R. The vegetation of the IBA is characterised by the occurrence of a large area of wet evergreen forest, while Fokienia forest is also present (Thewlis et al. 1998). The IBA lies within the Annamite mountains, at a point where the summit ridges are relatively low (below 1,000 m asl) and do not bar the passage of rain clouds carried by the north-eastern monsoon. In addition, the IBA also experiences the south-western monsoon, which brings rain to the rest of Lao P.D.R. (Evans and Timmins 1998). As a result, the area receives a greater amount of precipitation than many other areas of the Annamite mountains in Lao P.D.R. and has closer faunal affinities to the eastern flanks of the Annamites in Vietnam. The avifauna of the wet evergreen forest in the IBA has affinities with forest at higher elevations within Nakai-Nam Theun National Protected Area. This habitat supports some very important bird populations, especially high densities of Crested Argus Rheinardia ocellata and Grey Laughingthrush Garrulax maesi. In addition, the IBA is one of the few sites in Lao P.D.R. known to support Short-tailed Scimitar Babbler Jabouilleia danjoui (Evans and Timmins 1998). Furthermore, the IBA supports Great Hornbill Buceros bicornis, Brown Hornbill Anorrhinus tickelli and Rufous-necked Hornbill Aceros nipalensis. While, by itself, the IBA might not be able to support viable populations of all of these species in the long-term, it forms part of a network of contiguous sites throughout the Annamite mountains that might. Finally, the IBA supports one of the most significant known populations of Saola Pseudoryx nghetinhensis in Lao P.D.R.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Red-vented Barbet Psilopogon lagrandieri resident  2002  unknown  A3  Least Concern 
Green-eared Barbet Psilopogon faiostrictus resident  2002  unknown  A3  Least Concern 
Moustached Barbet Psilopogon incognitus resident  2002  unknown  A3  Least Concern 
Green-legged Partridge Arborophila chloropus resident  2002  frequent  A3  Least Concern 
Grey Peacock-pheasant Polyplectron bicalcaratum resident  2002  uncommon  A3  Least Concern 
Rufous-throated Partridge Arborophila rufogularis resident  2002  frequent  A3  Least Concern 
Bar-backed Partridge Arborophila brunneopectus resident  2002  unknown  A3  Least Concern 
Silver Pheasant Lophura nycthemera resident  2002  unknown  A3  Least Concern 
Crested Argus Rheinardia ocellata resident  2002  common  A1, A2  Near Threatened 
Pied Falconet Microhierax melanoleucos resident  2002  unknown  A3  Least Concern 
Yellow-vented Green-pigeon Treron seimundi resident  2002  frequent  A3  Least Concern 
Grey-headed Parakeet Psittacula finschii resident  2002  uncommon  A3  Near Threatened 
Coral-billed Ground-cuckoo Carpococcyx renauldi resident  2002  unknown  A3  Least Concern 
Hodgson's Frogmouth Batrachostomus hodgsoni resident  2002  unknown  A3  Least Concern 
Blyth's Kingfisher Alcedo hercules resident  2002  common  A3  Near Threatened 
Austen's Brown Hornbill Anorrhinus austeni resident  2002  common  A3  Near Threatened 
Megalaima asiatica resident  2002  unknown  A3  Not Recognised 
Megalaima franklinii resident  2002  common  A3  Not Recognised 
Red-collared Woodpecker Picus rabieri resident  2002  uncommon  A3  Near Threatened 
Pale-headed Woodpecker Gecinulus grantia resident  2002  unknown  A3  Least Concern 
Bay Woodpecker Blythipicus pyrrhotis resident  2002  frequent  A3  Least Concern 
Blue-rumped Pitta Pitta soror resident  2002  frequent  A3  Least Concern 
Blue Pitta Pitta cyanea resident  2002  unknown  A3  Least Concern 
Ashy Woodswallow Artamus fuscus resident  2002  unknown  A3  Least Concern 
Black-winged Cuckooshrike Coracina melaschistos resident  2002  frequent  A3  Least Concern 
Brown-rumped Minivet Pericrocotus cantonensis resident  2002  unknown  A3  Least Concern 
Short-billed Minivet Pericrocotus brevirostris resident  2002  unknown  A3  Least Concern 
Burmese Shrike Lanius collurioides resident  2002  unknown  A3  Least Concern 
Maroon Oriole Oriolus traillii resident  2002  common  A3  Least Concern 
Crow-billed Drongo Dicrurus annectans breeding  2002  unknown  A3  Least Concern 
White-winged Magpie Urocissa whiteheadi resident  2002  unknown  A3  Least Concern 
Yellow-breasted Magpie Cissa hypoleuca resident  2002  uncommon  A3  Least Concern 
Grey Treepie Dendrocitta formosae resident  2002  common  A3  Least Concern 
Ratchet-tailed Treepie Temnurus temnurus resident  2002  common  A3  Least Concern 
Sultan Tit Melanochlora sultanea resident  2002  common  A3  Least Concern 
Black-throated Tit Aegithalos concinnus resident  2002  frequent  A3  Least Concern 
Flavescent Bulbul Pycnonotus flavescens resident  2002  uncommon  A3  Least Concern 
Grey-eyed Bulbul Iole propinqua resident  2002  unknown  A3  Least Concern 
Mountain Bulbul Hypsipetes mcclellandii resident  2002  unknown  A3  Least Concern 
Asian Black Bulbul Hypsipetes leucocephalus resident  2002  unknown  A3  Least Concern 
Sulphur-breasted Warbler Phylloscopus ricketti resident  2002  frequent  A3  Least Concern 
Slaty-bellied Tesia Tesia olivea resident  2002  unknown  A3  Least Concern 
Yellow-vented Warbler Phylloscopus cantator passage  2002  uncommon  A2  Least Concern 
White-spectacled Warbler Seicercus affinis resident  2002  unknown  A3  Least Concern 
Rufous-faced Warbler Abroscopus albogularis resident  2002  common  A3  Least Concern 
Short-tailed Scimitar-babbler Jabouilleia danjoui resident  2002  frequent  A2  Near Threatened 
Grey-headed Parrotbill Paradoxornis gularis resident  2002  frequent  A3  Least Concern 
Spot-throated Babbler Pellorneum albiventre resident  2002  unknown  A3  Least Concern 
Red-billed Scimitar-babbler Pomatorhinus ochraceiceps resident  2002  common  A3  Least Concern 
Streaked Wren-babbler Napothera brevicaudata resident  2002  frequent  A3  Least Concern 
Lesser Necklaced Laughingthrush Garrulax monileger resident  2002  unknown  A3  Least Concern 
Greater Necklaced Laughingthrush Garrulax pectoralis resident  2002  unknown  A3  Least Concern 
Rufous-cheeked Laughingthrush Garrulax castanotis resident  2002  common  A3  Least Concern 
Black-throated Laughingthrush Garrulax chinensis resident  2002  frequent  A3  Least Concern 
Red-tailed Laughingthrush Garrulax milnei resident  2002  unknown  A3  Least Concern 
Blue-winged Minla Minla cyanouroptera resident  2002  frequent  A3  Least Concern 
Grey-cheeked Fulvetta Alcippe morrisonia resident  2002  common  A3  Least Concern 
Indochinese Yuhina Yuhina torqueola resident  2002  frequent  A3  Least Concern 
Black-chinned Yuhina Yuhina nigrimenta resident  2002  common  A3  Least Concern 
Golden-crested Myna Ampeliceps coronatus resident  2002  unknown  A3  Least Concern 
Green Cochoa Cochoa viridis resident  2002  unknown  A3  Least Concern 
Slaty-backed Forktail Enicurus schistaceus resident  2002  unknown  A3  Least Concern 
Jerdon's Bushchat Saxicola jerdoni unknown  2002  unknown  A3  Least Concern 
White-gorgeted Flycatcher Ficedula monileger resident  2002  frequent  A3  Least Concern 
Hainan Blue-flycatcher Cyornis hainanus resident  2002  unknown  A3  Least Concern 
Small Niltava Niltava macgrigoriae resident  2002  frequent  A3  Least Concern 
Fujian Niltava Niltava davidi passage  2002  rare  A3  Least Concern 
Orange-bellied Leafbird Chloropsis hardwickii resident  2002  frequent  A3  Least Concern 
Fork-tailed Sunbird Aethopyga christinae resident  2002  common  A3  Least Concern 
Black-throated Sunbird Aethopyga saturata resident  2002  common  A3  Least Concern 
Streaked Spiderhunter Arachnothera magna resident  2002  common  A3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Nam Theun Ext. National Biodiversity Conservation Area 64,500 protected area contained by site 64,500  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest Hill evergreen forest (subtropical)  -

Land use

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

Other biodiversity Tobias (1997) reported that the IBA supports population of Sunda Pangolin M. javanica, Inornate Squirrel C. inornatus, Leopard Cat P. bengalensis and possibly Chinese Pangolin M. pentadactyla, Dhole C. alpinus, Owston's Palm Civet H. owstoni, Tiger P. tigris and Indochinese Warty Pig S. bucculentus.Tobias (1997) and Tizard (1996) reported the IBA supports six species of primates: Slow Loris Nycticebus coucang, Pygmy Loris N. pygmaeus, Rhesus Macaque Macaca mulatta, Douc Langur Pygathrix nemaeus and White-cheeked Crested Gibbon Hylobates leucogenys.The IBA supports a large area of Fokienia forest (Fokienia hodginsii) and forest containing Fokienia speciesSaola Pseudoryx nghetinhensis (Tizard 1996; Timmins & Evans 1996 and Tobias 1997).

Further web sources of information 

Site account from Important Bird Areas in Lao P.D.R. (Ounekham and Inthapatha 2003)

References Document nameTizard, R. J. (1996) A preliminary wildlife and habitat survey of the proposed northern extension to the Nakai-Nam Theun National Biodiversity Conservation Area and the adjacent Nam Gnouang area, Bolikhamsai province, Lao PDR. Vientiane: WCS.Tobias, J. (1997) Environmental and social action plan for the Nakai-Nam Theun catchment and corridor areas: report of the wildlife survey. Vientiane: WCS report to IUCN.Thewlis, R. M., Timmins, R. J., Evans, T. D. and Duckworth, J. W. (1998) The conservation status of birds in Laos: a review of key species. Bird Conserv. Internat. 8(suppl.): 1-159.Evans, T. D. and Timmins, R. J. (1998) Records of birds from Laos during January-July 1994. Forktail 13: 69-96.Duckworth, J. W., Salter, R. E. and Khounboline, K. eds. (1999) Wildlife in Lao P.D.R.: 1999 status report. Vientiane: IUCN, WCS and CPAWM.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Eastern Bolikhamxay Mountains. Downloaded from http://www.birdlife.org on 25/10/2014

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