Long-bearded Honeyeater Melionyx princeps


Taxonomic source(s)
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
- - C2a(i)

Red List history
Year Category Criteria
2018 Vulnerable C2a(i)
2016 Vulnerable B1ab(ii,iii,v); C2a(i)
2012 Vulnerable B1ab(ii,iii,v);C2a(i)
2008 Vulnerable B1a+b(ii,iii,v); C2a(i)
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

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

Estimate Data quality
Extent of Occurrence (breeding/resident) 29,100 km2 medium
Number of locations 6-10 -
Severely fragmented? no -
Estimate Data quality Derivation Year of estimate
Population size 2500-9999 mature individuals poor estimated 2000
Population trend decreasing poor suspected 1998-2008
Generation length 5.8 years - - -
Number of subpopulations 2-100 - - -

Population justification: The population is poorly-known but 11 individuals were counted (along with 70 Sooty Melidectes Melidectes fuscus) on 12 censuses in the Kaijende Highlands (Beehler and Sine 2007). The population is precautionarily estimated to number 2,500-9,999 mature individuals, with possibly no more than 1000 in any subpopulation, based on the small number of individuals recorded across its restricted geographical range.

Trend justification: There are no data on population trends and its high-altitude locations are largely safe from direct impacts. However, the species is thought to be slowly declining because of habitat degradation at some of its more accessible locations close to centres of human population such as Mt Hagen.

Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Papua New Guinea extant native yes

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

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Grassland Subtropical/Tropical High Altitude major resident
Shrubland Subtropical/Tropical High Altitude suitable resident
Altitude 3000 - 3800 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Shifting agriculture Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Ecosystem degradation, Ecosystem conversion
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Indirect ecosystem effects, Ecosystem degradation
Natural system modifications Fire & fire suppression - Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Ecosystem degradation

Recommended citation
BirdLife International (2023) Species factsheet: Melionyx princeps. Downloaded from on 05/12/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 05/12/2023.