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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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2023	Near Threatened	B1b(iii)+2b(iii)
2016	Data Deficient
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	432 km2	medium
Area of Occupancy (breeding/resident)	432 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	2016-2028
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Generation length	4.1 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: This species is poorly known and the population size has not been quantified. It was previously known only from specimens collected by Albert S. Meek in 1898 and a reported sighting of one individual in December 2014 during four full days on the island (W. Goulding in litt. 2016, del Hoyo et al. 2020). However, both sexes of the species were recorded in 2019 near Yonga Bay, not far from the 2014 sighting, suggesting they are not overly uncommon (W. Goulding in litt. 2020).

Trend justification: Although the species is poorly known, it is precautionarily suspected to be declining slowly owing to ongoing forest loss within its range. In the three generations (12.3 years; Bird et al. 2020) to 2021, remote sensing data indicate that 3-5% of forest was lost in this species' range (Global Forest Watch 2022, using data from Hansen et al. [2013] and methods disclosed therein) and this may accelerate slightly (to a rate equivalent to 4-6% over three generations) in the future based on losses in 2016-2021. Population declines are suspected to be roughly equivalent to the rate of tree cover loss. The rate of population decline is therefore placed here in the range 1-9% in three generations.

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Altitude	0 - 800 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2025) Species factsheet: Rossel Cicadabird Edolisoma rostratum. Downloaded from https://datazone.birdlife.org/species/factsheet/rossel-cicadabird-edolisoma-rostratum on 10/01/2025.
Recommended citation for factsheets for more than one species: BirdLife International (2025) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 10/01/2025.