• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note

Ceyx lepidus, C. margarethae, C. wallacii, C. cajeli, C. solitarius, C. dispar, C. mulcatus, C. sacerdotis, C. meeki, C. collectoris, C. nigromaxilla and C. gentianus (del Hoyo and Collar 2014) were previously lumped as C. lepidus following Sibley and Monroe (1990, 1993).

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2017	Least Concern
2016	Near Threatened	D2
2014	Near Threatened	D2

Migratory status	not a migrant	Forest dependency	Medium
Land mass type		Average mass	19 g

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	4,300
Number of locations		-
Severely Fragmented		-

	Value	Data quality	Derivation	Year of estimate
No. of mature individuals	10000-30000	poor	inferred	2017
Population trend	Stable		suspected	-
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	1	-	-	-
Percentage in largest subpopulation	100	-	-	-
Generation length (yrs)	4.2	-	-	-

Population justification: Encounter rates of this species were recorded at 30-90 birds per km2 by Buckingham et al. (1990), which would roughly equate to 20-60 mature individuals per km2, and subsequent field work on the island appears consistent with these densities (Danielsen et al. 2010, G. Dutson in litt. 2016). Therefore, conservatively assuming only a proportion of its range is occupied, the population size of this species would fall in the range 10,000-30,000 mature individuals. However, this may be an underestimate of the overall population size (per G. Dutson in litt. 2016).

Trend justification: The population is suspected to be stable overall in the absence of evidence for any declines or substantial threats, particularly as this species is relatively tolerant of degraded habitats (Buckingham et al. 1990; G. Dutson in litt. 2016).

Country/Territory	Occurrence status	Presence	Resident	Breeding	Non-breeding	Passage
Solomon Islands	N	Extant	Yes

Country/Territory	IBA Name
Solomon Islands	East Makira

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Shrubland	Subtropical/Tropical Moist	suitable	resident
Wetlands (inland)	Permanent Rivers/Streams/Creeks (includes waterfalls)	suitable	resident
Altitude		Occasional altitudinal limits

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%)		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2023) Species factsheet: Ceyx gentianus. Downloaded from http://www.birdlife.org on 24/03/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 24/03/2023.