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CR
Rueck's Blue-flycatcher Cyornis ruckii

IUCN Red List Criteria

Critically Endangered D 
Endangered D 
Vulnerable D1 

IUCN Red List history

Year Category
2012 Critically Endangered
2010 Critically Endangered
2009 Critically Endangered
2008 Critically Endangered
2004 Critically Endangered
2000 Critically Endangered
1996 Vulnerable
1994 Vulnerable
1988 Threatened

Species attributes

Migratory status not a migrant Forest dependency Unknown
Land mass type shelf island
 Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 5,600 medium
Number of locations -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 1-49 poor Estimated 2000
Population trend Unknown -
Number of subpopulations 1 - - -
Largest subpopulation 1-49 - - -
Population justification: The population is assumed to be tiny (fewer than 50 individuals and mature individuals) based on a lack of records, despite searches, since two specimens were collected in 1917-1918.

Country/Territory distribution

Country/Territory Occurrence status Extinct Breeding Non-breeding Passage
Indonesia Native No Yes    

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland possible resident
Altitude 150 - 200 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:
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & Aquaculture Livestock farming & ranching / Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Fishing & harvesting aquatic resources / Unintentional effects: (large scale) Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact:
Stresses
None
Biological resource use Fishing & harvesting aquatic resources / Unintentional effects: (subsistence/small scale) Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact:
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2013) Species factsheet: Cyornis ruckii. Downloaded from http://www.birdlife.org on 23/05/2013. Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/05/2013.

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 Critically Endangered
Family Muscicapidae (Chats and Old World flycatchers)
Species name author (Oustalet, 1881)
Population size 1-49 mature individuals
Population trend Unknown
Distribution size (breeding/resident) 5,600 km2
Country endemic? Yes
Links to further information
- Summary information on this species