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

Taxonomic note

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	C2a(ii)	C2a(i,ii)

Red List history

Year	Category	Criteria
2016	Endangered	C2a(ii)
2013	Endangered	C2a(ii)
2012	Vulnerable	C2a(ii)
2010	Vulnerable	C2a(ii)
2008	Vulnerable	C2a(ii)
2007	Vulnerable
2004	Vulnerable
2000	Vulnerable
1996	Vulnerable
1994	Vulnerable
1988	Threatened

Migratory status	full migrant	Forest dependency	high
Land-mass type	continent	Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	236,000 km2	medium
Extent of Occurrence (non-breeding)	77,000 km2	medium
Number of locations	11-100	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	1000-2499 mature individuals	poor	estimated	2013
Population trend	decreasing	poor	suspected	2011-2022
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	3.7 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The population was previously estimated to number 2,500-9,999 mature individuals, based on an assessment of known records, descriptions of abundance and range size. However, the scarcity of the species has prompted this to be revised downwards to 1,000-2,499 mature individuals, equivalent to a total population of c.1,500-3,800 individuals.

Trend justification: The species is suspected to be declining at a moderate rate owing to forest clearance and degradation in its breeding grounds. Much remaining forest in the breeding strongholds of Sichuan, China, was earmarked as forest concessions for clearance in the next 20-25 years; however, a ban on logging in this area may prevent this rapid increase in logging pressure within the species's range.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Cambodia	extant	native			yes
China (mainland)	extant	native		yes
Thailand	extant	native			yes

Country/Territory	IBA Name
China (mainland)	Damingshan
China (mainland)	Dayao Shan Nature Reserve
China (mainland)	Dazhubao and Dafengding
China (mainland)	Huping Shan Nature Reserve
China (mainland)	Longhushan
China (mainland)	Longlin-Xilin
China (mainland)	Mamize Nature Reserve
China (mainland)	Mao'er Shan Nature Reserve
China (mainland)	Maolan Nature Reserve
China (mainland)	Maozi Feng
China (mainland)	Nanling mountains
China (mainland)	Shiwandashan
Thailand	Kaeng Krachan
Thailand	Khao Ang Ru Nai
Thailand	Khao Soi Dao
Thailand	Khao Yai

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	suitable	breeding
Forest	Subtropical/Tropical Moist Lowland	suitable	non-breeding
Forest	Subtropical/Tropical Moist Montane	major	breeding
Forest	Subtropical/Tropical Moist Montane	major	non-breeding
Altitude	600 - 1700 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		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%)		Unknown		Unknown
		Stresses Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: Silver Oriole Oriolus mellianus. Downloaded from https://datazone.birdlife.org/species/factsheet/silver-oriole-oriolus-mellianus on 23/11/2024.
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 23/11/2024.