email a friend
printable version
VU
Large-billed Blue-flycatcher Cyornis caerulatus

IUCN Red List Criteria

Critically Endangered  
Endangered  
Vulnerable A2c+3c+4c 

IUCN Red List history

Year Category
2012 Vulnerable
2008 Vulnerable
2004 Vulnerable
2000 Vulnerable
1994 Lower Risk/Near Threatened
1988 Near Threatened

Species attributes

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

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 963,000 medium
Number of locations 11-100 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 6000-15000 poor Estimated 2000
Population trend Decreasing poor -
Number of subpopulations 2-100 - - -
Largest subpopulation 1001-10000 - - -
Population justification: The population size is preliminarily estimated to fall into the band 10,000-19,999 individuals. This equates to 6,667-13,333 mature individuals, rounded here to 6,000-15,000 mature individuals.
Trend justification: A rapid and on-going population decline is suspected to be occurring, given that this species is restricted to lowland primary rainforest - a habitat that is being cleared at an alarming rate across the entire range.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Brunei Native Extant       Yes
Indonesia Native Extant       Yes
Malaysia Native Extant       Yes

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Brunei Belait Swamp Forest site factsheet
Brunei Southern Ladan Hills site factsheet
Brunei Ulu Temburong site factsheet
Indonesia Betung Kerihun site factsheet
Indonesia Bukit Bahar-Tajau Pecah site factsheet
Indonesia Bukit Baling site factsheet
Indonesia Kerinci Seblat site factsheet
Indonesia Malampah Alahan Panjang site factsheet
Malaysia Bako-Buntal Bay site factsheet
Malaysia Danum Valley Conservation Area site factsheet
Malaysia Dulit Range site factsheet
Malaysia Kabili-Sepilok site factsheet
Malaysia Kelabit Highlands site factsheet
Malaysia Kinabatangan floodplain site factsheet
Malaysia Lambir Hills National Park site factsheet
Malaysia Lanjak Entimau Wildlife Sanctuary site factsheet
Malaysia Maliau Basin Conservation Area site factsheet
Malaysia Mulu - Buda Protected Area site factsheet
Malaysia Niah National Park site factsheet
Malaysia Tabin Wildlife Reserve site factsheet
Malaysia Tawau Hills Park site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 0 - 500 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 / Shifting agriculture Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation
Natural system modifications Fire & fire suppression / Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2014) Species factsheet: Cyornis caerulatus. Downloaded from http://www.birdlife.org on 27/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 27/12/2014.

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 Vulnerable
Family Muscicapidae (Chats and Old World flycatchers)
Species name author (Bonaparte, 1857)
Population size 6000-15000 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 963,000 km2
Country endemic? No
Links to further information
- Summary information on this species