NT
Orange-necked Partridge Arborophila davidi



Taxonomy

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.

IUCN Red list criteria met and history
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
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 10,100 medium
Number of locations 11-100 -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 2500-9999 poor suspected 2009
Population trend Decreasing poor inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 10-19 - - -
Decline (10 years/3 generation past and future) 10-19 - - -
Number of subpopulations 2-100 - - -
Percentage in largest subpopulation 1-89 - - -
Generation length (yrs) 5.4 - - -

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 distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Cambodia N Extant Yes
Vietnam N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Vietnam Cat Loc
Vietnam Nam Cat Tien
Cambodia Snoul / Keo Sema / O Reang
Vietnam Cat Loc; Nam Cat Tien
Vietnam Bu Gia Map

Habitats & altitude
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  

Threats & impact
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

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Arborophila davidi. Downloaded from http://www.birdlife.org on 17/08/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 17/08/2022.