VU
Oahu Amakihi Chlorodrepanis flava



Taxonomy

Taxonomic note
Chlorodrepanis flava (del Hoyo and Collar 2016) was previously placed in the genus Hemignathus and listed as H. flavus following AOU (1998 & supplements); Sibley & Monroe (1990, 1993).

Taxonomic source(s)
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - D2

Red List history
Year Category Criteria
2016 Vulnerable D2
2012 Vulnerable D2
2008 Vulnerable D2
2004 Vulnerable
2000 Vulnerable
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,100 medium
Number of locations 2 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 13000-40000 poor estimated 1998
Population trend Stable medium estimated -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 2 - - -
Largest subpopulations - - -
Generation length (yrs) 5.5 - - -

Population justification: The population is estimated at 20,000-60,000 birds, roughly equivalent to 13,000-40,000 mature individuals, but surveys on O`ahu, unlike those on other Hawaiian islands, have not been systematic, and these estimates may be too high (R. Shallenberger in litt. 1999).

Trend justification: Christmas bird counts indicate a population decline from 1958 to 1985 (Jacobi and Atkinson 1995; Lindsey et al. 1998), but more recent information indicates that the population may be stable and even increasing in some areas (Lindsey et al. 1998).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
USA N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
USA Oahu Uplands

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable resident
Artificial/Terrestrial Urban Areas suitable resident
Forest Subtropical/Tropical Moist Montane major resident
Altitude 30 - 0 m Occasional altitudinal limits (min) 500 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Plasmodium relictum Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Unspecified species Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Reduced reproductive success

Recommended citation
BirdLife International (2020) Species factsheet: Chlorodrepanis flava. Downloaded from http://www.birdlife.org on 29/10/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/10/2020.