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Crow Honeyeater Gymnomyza aubryana

IUCN Red List Criteria

Critically Endangered C2a(ii) 
Endangered A2ce+3ce+4ce;B1ab(ii,iv,v);C2a(i,ii);D1 
Vulnerable A2ce+3ce+4ce;B1ab(ii,iv,v);C2a(i,ii);D 

IUCN Red List history

Year Category
2013 Critically Endangered
2012 Critically Endangered
2009 Critically Endangered
2008 Endangered
2004 Endangered
2000 Endangered
1996 Vulnerable
1994 Vulnerable
1988 Lower Risk/Least Concern

Species attributes

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

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,100 medium
Number of locations 11-100 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 50-249 medium Estimated 2009
Population trend Decreasing poor -
Number of subpopulations 1 - - -
Largest subpopulation 51-250 - - -
Generation length (yrs) 5.8 - - -
Population justification: The population is estimated to number 50-249 mature individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied, and may even be an overestimate given that densities are lower outside the Rivière Bleue valley (the species's stronghold) where the local population was estimated at 18 pairs by Létocart (pers. comm. 2000) in 1998. The estimate equates to 75-374 individuals in total, rounded here to 70-400 individuals.
Trend justification: There has been insufficient baseline monitoring of this species's population to empirically assess population trends. However, it was estimated to be comparatively common as recently as 2000 when the population was estimated at 1,000-3,000 individuals (Ekstrom et al. 2002). It seems likely that declines began prior to that period and may have increased since then; the most plausible threat being predation. For this reason a very rapid decline is suspected to be ongoing.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
New Caledonia (to France) Native Extant       Yes

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
New Caledonia (to France) Massif du Panié site factsheet
New Caledonia (to France) Massifs du Grand Sud - entre le mont Humboldt et la rivière Bleue site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry suitable resident
Forest Subtropical/Tropical Moist Lowland 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 / Small-holder farming 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: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Domestic Cat (Felis catus) Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Domestic Dog (Canis familiaris) Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Domestic Pig (Sus domesticus) Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Ecosystem degradation, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Unspecified rats (Rattus spp.) Timing Scope Severity Impact
Ongoing Majority (50-90%) Very Rapid Declines High Impact: 8
Stresses
Reduced reproductive success
Invasive and other problematic species, genes & diseases Problematic native species/diseases Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Species mortality

Recommended citation
BirdLife International (2014) Species factsheet: Gymnomyza aubryana. Downloaded from http://www.birdlife.org on 17/09/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 17/09/2014.

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 Critically Endangered
Family Meliphagidae (Honeyeaters)
Species name author (Verreaux & Des Murs, 1860)
Population size 50-249 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 1,100 km2
Country endemic? Yes
Links to further information
- Summary information on this species