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Silver Oriole Oriolus mellianus

IUCN Red List Criteria

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

IUCN Red List history

Year Category
2013 Endangered
2012 Vulnerable
2010 Vulnerable
2008 Vulnerable
2007 Vulnerable
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened

Species attributes

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

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 27,600 medium
Extent of Occurrence non-breeding (km2) 11,600 medium
Number of locations 11-100 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 1000-2499 poor Estimated 2013
Population trend Decreasing poor -
Number of subpopulations 1 - - -
Largest subpopulation 1000-2499 - - -
Generation length (yrs) 3.7 - - -
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 distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Cambodia Native Extant   Yes    
China (mainland) Native Extant Yes      
Thailand Native Extant   Yes    

Important Bird Areas where this species has triggered the IBA criteria

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

Habitats & altitude

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  

Threats & impact

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 Decline 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 Decline 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
None
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline 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 Decline Medium Impact: 6
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2014) Species factsheet: Oriolus mellianus. Downloaded from http://www.birdlife.org on 19/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/12/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Endangered
Family Oriolidae (Orioles and figbirds)
Species name author Stresemann, 1922
Population size 1000-2499 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 27,600 km2
Country endemic? No
Links to further information
- Summary information on this species