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

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
-	-	C2a(ii)

Red List history

Year	Category	Criteria
2024	Vulnerable	C2a(ii)
2016	Vulnerable	C2a(ii)
2013	Vulnerable	C2a(ii)
2012	Near Threatened	B1ab(iii);C1+2a(ii);D2
2008	Near Threatened	C1; C2a(ii); D2
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	316 km2	medium
Area of Occupancy (breeding/resident)	316 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	2500-4000 mature individuals	medium	estimated	2023
Population trend	decreasing	poor	inferred	-
Generation length	3.23 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: Based on 90 encounters in 1998, the species is thought to occur at a density of approximately 36 individuals/km² (G. Dutson in litt. 2013). A total of c.150 km² of forest is thought to remain within the range (Global Forest Watch 2023, based on data from Hansen et al. [2013] and methods disclosed therein). Assuming high occupancy of available habitat (c.60-90%), the total population is thought to number 3,200-4,800 individuals and is tentatively placed in the band 2,500-4,000 mature individuals.

Trend justification: This species is forest-dependent and susceptible to logging and forest loss (Dutson 2011). Habitat degradation and conversion are ongoing, primarily through encroachment for subsistence agriculture (G. Dutson in litt. 2013) and logging which was reportedly re-commenced on Vanikoro in 2014 (Pierce 2014). Commercial logging operations have converted large areas of habitat to secondary forest in various stages of succession (Lavery et al. 2020), and the species does not occur in open secondary forest (Dutson 2011). Given that this species occupies the majority of the island at a relatively high density, the removal of even a small amount of forest is likely to be linked to a population decline. In the ten years to 2023, remote sensing data indicate that c.2% of forest was lost in this species' range (Global Forest Watch 2022, using data from Hansen et al. [2013] and methods disclosed therein), though this was largely attributed to steeper declines in 2017. This value only amounts to total clearance however and is thought to underestimate overall impacts of habitat loss and degradation on this species (M. O'Brien in litt. 2023). Additionally, the presence of logging roads on the island show that the area is becoming more accessible to loggers, with the majority of the range lying less than 1km from a logging road (Global Witness 2018, M. O'Brien in litt. 2023). As such, a decline is precautionarily inferred overall, although the rate has not been quantified.

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

Country/Territory	IBA Name
Solomon Islands	Vanikoro

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 450 m	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%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Vanikoro Monarch Mayrornis schistaceus. Downloaded from https://datazone.birdlife.org/species/factsheet/vanikoro-monarch-mayrornis-schistaceus on 24/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 24/12/2024.