San Cristobal Dwarf-kingfisher (Ceyx gentianus)

San Cristobal Dwarf-kingfisher Ceyx gentianus

Current view: Data table and detailed info

Taxonomy

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.

IUCN Red List criteria met and history

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
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Species attributes

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

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	4,300 km²
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	10000-30000 mature individuals	poor	inferred	2017
Population trend	stable	-	suspected	-
Generation length	4.2 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

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 distribution

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Solomon Islands	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Solomon Islands	East Makira

Habitats & altitude

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

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%)

Unknown

Stresses
Ecosystem degradation, Ecosystem conversion

Biological resource use

Logging & wood harvesting - Unintentional effects: (large scale) [harvest]