• 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
-	-	-

Red List history

Year	Category	Criteria
2022	Near Threatened	D1
2016	Near Threatened	D2
2015	Near Threatened	D2
2012	Vulnerable	D2
2008	Vulnerable	D2
2004	Vulnerable
2000	Vulnerable
1996	Vulnerable
1994	Vulnerable
1988	Near Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	28 km2	medium
Area of Occupancy (breeding/resident)	18 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	1300-2000 mature individuals	medium	estimated	2011
Population trend	stable	poor	suspected	-
Generation length	3.53 years	-	-	-

Population justification: In 1986, the species was estimated to have a total population of c.2,000 individuals (Watling 1988). Surveys conducted on Ogea Levu and Ogea Driki in July 2011 (following Watling's [1988] methodology) recorded 49 individuals, equating to 19.22 per 10 ha (Andersen et al. 2012), compared with 10.68 per 10 ha in 1986 (Watling 1988). Crude extrapolation from these data yields a current estimate of 3,204 individuals compared with 1,780 in 1986 (Watling 1988). However, this is based on surveys conducted over three days and it is difficult to draw firm conclusions about the true population size and whether this apparent change in the population size represents a genuine increase or simple variation in the population. No more recent population estimate has been made, and thus the population is estimated to number 2,000-3,000 individuals, based on Watling (1988) and Andersen et al. (2012). This equates to 1,333-2,000 mature individuals, rounded here to 1,300-2,000 mature individuals.

Trend justification: The species is tolerant of habitat degradation and does not appear to be declining despite the presence of introduced predators. Based on results from Andersen et al.'s (2012) survey, there appears to be no evidence for a population decline and there is no more recent trend assessment. Consequently, its population is assessed as stable.

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

Country/Territory	IBA Name
Fiji	Ogea

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 82 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Climate change & severe weather	Storms & flooding	Timing		Scope		Severity		Impact
		Past, Likely to Return		Whole (>90%)		Negligible declines		Past Impact
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Problematic native species/diseases - Circus approximans	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Problematic native species/diseases - Mayrornis lessoni	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		No decline		Low Impact: 4
		Stresses Hybridisation
Invasive and other problematic species, genes & diseases	Problematic native species/diseases - Tyto alba	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality

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Recommended citation
BirdLife International (2024) Species factsheet: Ogea Monarch Mayrornis versicolor. Downloaded from https://datazone.birdlife.org/species/factsheet/ogea-monarch-mayrornis-versicolor on 23/12/2024.
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 23/12/2024.