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The site was identified as internationally important for bird conservation in 2002 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Green-legged Partridge Tropicoperdix chloropus	LC	resident (2002)	frequent	A2, A3
Annamite Crested Argus Rheinardia ocellata	CR	resident (2002)	5–12 males	A1, A2, A3
Grey Peacock-Pheasant Polyplectron bicalcaratum	LC	resident (2000)	present	A3
Siamese Fireback Lophura diardi	LC	resident (1999)	present	A1, A3
Vietnam Pheasant Lophura edwardsi	CR	resident (1998–1999)	1 birds	A2, A3
Lesser Fish-eagle Icthyophaga humilis	NT	non-breeding (2002)	1 birds	A1
Anorrhinus tickelli	NR	resident (2002)	11 birds	A1
Red-vented Barbet Psilopogon lagrandieri	LC	resident (2000)	present	A3
Green-eared Barbet Psilopogon faiostrictus	LC	resident (2000)	present	A3
Red-collared Woodpecker Picus rabieri	NT	resident (2002)	present	A1, A3
Bar-bellied Pitta Hydrornis elliotii	LC	resident (2000)	present	A3
Crow-billed Drongo Dicrurus annectens	LC	resident (2000)	present	A3
Sultan Tit Melanochlora sultanea	LC	resident (2000)	present	A3
Grey-eyed Bulbul Iole propinqua	LC	resident (2000)	present	A3
Indochinese Wren-babbler Napothera danjoui	NT	resident (2002)	present	A1, A2
Lesser Necklaced Laughingthrush Garrulax monileger	LC	resident (2000)	present	A3

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2002. The most recent assessment (2007) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Forest	-	-	moderate

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Energy production and mining	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Transportation and service corridors	likely in short term (<4 years)	some of popul­ation/area (10–49%)	moderate decline (10–30% over 3 gener­ations)	medium
Agricultural expansion and intensification	likely in long term (>4 years)	some of popul­ation/area (10–49%)	moderate decline (10–30% over 3 gener­ations)	medium
Biological resource use	likely in long term (>4 years)	some of popul­ation/area (10–49%)	moderate decline (10–30% over 3 gener­ations)	medium
Pollution	likely in long term (>4 years)	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Most of area (50–90%) covered (including the most critical parts for important bird species)	A management plan exists, but it is out of date or not compre­hensive	Substantive conservation measures are being implemented, but these are not compre­hensive and are limited by resources and capacity	medium

The Local Conservation Group(s) listed below are working to conserve this IBA.

Name	Year formed
Site Support Groups of Cop village; Huong Lap commune, Bac Huong HoaNature Reserve	2004
Site Support Groups of Cuoi village; Huong Lap commune, Bac Huong Hoa Nature Reserve	2004

For more information on BirdLife's work with Local Conservation Groups, please visit Spotlight on local empowerment.

Habitat	% of IBA	Habitat detail
Artificial/Terrestrial	-
Forest	-
Shrubland	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Truong Son (Vietnam). Downloaded from https://datazone.birdlife.org/site/factsheet/truong-son-iba-vietnam on 23/12/2024.