• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2019	Near Threatened	B1ab(iii); C2a(i)
2016	Near Threatened	B1b(iii); C2a(i)
2012	Near Threatened	B1ab(iii);C2a(i)
2009	Near Threatened	B1a+b(iii); C2a(i)
2008	Endangered
2004	Endangered
2000	Endangered
1996	Critically Endangered
1994	Critically Endangered
1988	Threatened

Migratory status	not a migrant	Forest dependency	medium
Land-mass type	continent	Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	10,100 km2	medium
Number of locations	11-100	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	2500-9999 mature individuals	poor	suspected	2009
Population trend	decreasing	poor	inferred	2008-2024
Rate of change over the past 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Generation length	5.4 years	-	-	-
Number of subpopulations	2-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The species is now known from many sites in southern Viet Nam and one site in Cambodia. The area of suitable habitat has been found to be more extensive than was previously thought, and given the population densities recorded in several congeners and their ability to persist in partly degraded habitats it seems likely that the population approaches 10,000 individuals, which equates to 6,667 mature individuals and it is thus placed in the band 2,500-9,999 mature individuals. The majority of the population occurs in southern Viet Nam, but the largest subpopulation is suspected to be close to as few as 1,000 mature individuals, depending on population connectivity in a region with highly discontinuous remaining suitable habitat.

Trend justification: This species is assumed to have declined owing to forest clearance and hunting within its small range, but it is probably tolerant to some degree of forest degradation. An analysis of deforestation from 2000 to 2012 found that forest within the species's range was lost at a rate equivalent to 18% over three generations (Tracewski et al. 2016). The population is therefore assumed to decline at a rate of 10-19% over three generations. Declines are thought to be continuing as forest clearance continues.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Cambodia	extant	native	yes
Vietnam	extant	native	yes

Country/Territory	IBA Name
Cambodia	Snoul / Keo Sema / O Reang
Vietnam	Cat Loc
Vietnam	Nam Cat Tien

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Shrubland	Subtropical/Tropical Moist	suitable	resident
Altitude	120 - 600 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion

Purpose	Scale
Food - human	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Orange-necked Partridge Arborophila davidi. Downloaded from https://datazone.birdlife.org/species/factsheet/orange-necked-partridge-arborophila-davidi on 28/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 28/11/2024.