EN
Pohnpei Cicadabird Edolisoma insperatum



Taxonomy

Taxonomic note
Edolisoma tenuirostre, E. insperatum, E. nesiotis, E. monacha, E. rostratum, E. meyerii, E. obiense, E. grayi, E. remotum and E. salomonis (del Hoyo and Collar 2016) were previously lumped as Coracina tenuirostris following Christidis & Boles (2008) and Sibley & Monroe (1990, 1993).

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(ii) C2a(i,ii); D1

Red List history
Year Category Criteria
2016 Endangered C2a(ii)
Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type Average mass 58.90000153 g
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,700
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 600-1700 poor inferred 2016
Population trend Decreasing 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) 20-29 - - -
Decline (10 years/3 generation past and future) 20-29 - - -
Number of subpopulations 1 - - -
Largest subpopulations 100 - - -
Generation length (yrs) 4.6 - - -

Population justification: The global population size was estimated at 2060 birds in 1983 (Engbring 1990), but since that time a large proportion of native forest has been lost from the island. Surveys in 2012 only recorded the species 8 times from 247 widely distributed survey stations (Oleiro and Kessler unpub. rep.), and generally reported decreases in forest associated species. The population is is placed in the band 1,000-2,499 individuals, equating to 667-1,666 mature individuals which is rounded here to 600-1,700 mature individuals.

Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Micronesia, Federated States of N Extant 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 Lowland major resident
Forest Subtropical/Tropical Moist Montane major resident
Marine Intertidal Mangrove Submerged Roots suitable resident
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Biological resource use Logging & wood harvesting Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2019) Species factsheet: Edolisoma insperatum. Downloaded from http://www.birdlife.org on 19/03/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/03/2019.