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Hook-billed Bulbul Setornis criniger

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 Lower Risk/Least Concern

Species attributes

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

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 779,000 medium
Number of locations 11-100 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 10000-19999 poor Estimated 2000
Population trend Decreasing poor -
Number of subpopulations 2-100 - - -
Largest subpopulation 1001-10000 - - -
Generation length (yrs) 3.5 - - -
Population justification: The population size is preliminarily estimated to fall into the band 10,000-19,999 mature individuals. This equates to 15,000-29,999 individuals in total, rounded here to 15,000-30,000 individuals.
Trend justification: Recent data on the population size and trend are lacking, but habitat conversion continues at a catastrophic rate across the region, particularly within the specialised habitats occupied by this species, suggesting a rapid and continuing decline.

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
Indonesia Bukit Baling site factsheet
Indonesia Gunung Palung site factsheet
Indonesia Hutan Rawa Gambut Siak-Kampar site factsheet
Indonesia Kayan Mentarang site factsheet
Indonesia Tanjung Puting site factsheet
Indonesia Tesso Nilo site factsheet
Indonesia Ulu Barito site factsheet
Malaysia Bako-Buntal Bay site factsheet
Malaysia Danum Valley Conservation Area site factsheet
Malaysia Dulit Range site factsheet
Malaysia Kinabatangan floodplain site factsheet
Malaysia Klias peninsula site factsheet
Malaysia Lambir Hills National Park site factsheet
Malaysia Lanjak Entimau Wildlife Sanctuary site factsheet
Malaysia Mulu - Buda Protected Area site factsheet
Malaysia Niah National Park site factsheet
Malaysia Sadong-Saribas coast site factsheet
Malaysia Similajau National Park site factsheet
Malaysia Tabin Wildlife Reserve site factsheet
Malaysia Tanjung Datu-Samunsam Protected Area site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable resident
Forest Subtropical/Tropical Moist Lowland suitable resident
Forest Subtropical/Tropical Swamp major resident
Altitude 0 - 1000 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
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
Agriculture & aquaculture Wood & pulp plantations / Agro-industry plantations Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Natural system modifications Fire & fire suppression / Trend Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Ecosystem degradation
Residential & commercial development Commercial & industrial areas Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2014) Species factsheet: Setornis criniger. Downloaded from http://www.birdlife.org on 20/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/12/2014.

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 Pycnonotidae (Bulbuls)
Species name author Lesson, 1839
Population size 10000-19999 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 779,000 km2
Country endemic? No
Links to further information
- Summary information on this species