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.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | C2a(i) | C2a(i) |
Year | Category | Criteria |
---|---|---|
2024 | Endangered | C2a(i) |
2016 | Endangered | C2a(ii) |
2012 | Endangered | C2a(ii) |
2008 | Endangered | C2a(ii) |
2004 | Endangered | |
2000 | Endangered | |
1996 | Endangered | |
1994 | Endangered | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | medium |
Land-mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 870 km2 | medium |
Area of Occupancy (breeding/resident) | 240 km2 | |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 1000-2499 mature individuals | medium | estimated | 1990 |
Population trend | decreasing | poor | inferred | - |
Generation length | 3.83 years | - | - | - |
Number of subpopulations | 5-15 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: The population has not been robustly estimated since 1984 when numbers were estimated at 2,168 (Engbring et al. 1990). In the absence of more recent and complete data, and accounting for the fact that only a proportion likely refer to mature individuals, the population is tentatively placed in the range 1,000-2,499 mature individuals. There is evidence however that the species has likely declined since the 1984 estimate (see Population trend), and an up-to-date quantification of the population size is urgently required. There is an urgent need to collect up-to-date information on populations from the Faichuk group, particularly Tol South and Polle where relatively large numbers were recorded in 1984.
Trend justification: This species is thought to occur at highest densities in native forest which is subject to deforestation and contains non-native species (Engbring et al. 1990, SPREP 2001), and may continue to be under threat from population pressures which are causing ongoing habitat degradation throughout Chuuk (R. Davis in litt. 2023). Observations in 2001 suggested that it had declined to lower population densities compared to 1984 (G. Dutson in litt. 2003). On Tol South, no birds were found in a visit in 1991 and only 3-4 birds in 1993, although birds were seen again in 2005 (C. Collins in litt. 2005). It was thought to have been extirpated from Weno after a major fire destroyed the patch of forest where it was uncommon in the 1970s (H. D. Pratt in litt. 1994); however, two males were seen in Sopo Forest in 2005 (C. Collins in litt. 2005). The species now appears to be rare on Weno (C. Collins in litt. 2011), and according to local people it is becoming rarer on Tol South (D. Scott in litt. 2011). It was not found in 2010 in an area on Dublon Island where it had been seen in 2008 (D. Scott in litt. 2011). In 2022, sound recorders were used to capture the aural landscape at stations previously surveyed in 1984, however difficulties regarding access permissions meant that only 130 of 579 stations could be resurveyed (O'Brien 2023). The species was present at 17 of these 130 stations in 1984, but no calls were isolated from the recordings made in 2022 (O'Brien 2023). Although this may be partly due to restricted knowledge of the repertoire of this species, it is a considerable concern especially considering the overall lack of monitoring data and no access to the population currently being possible. Precautionarily therefore, the population is inferred to be declining overall.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Micronesia, Federated States of | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Micronesia, Federated States of | Mount Winipot / Tol South |
Micronesia, Federated States of | Pata Island |
Micronesia, Federated States of | South Weno Ridge |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Terrestrial | Plantations | marginal | resident |
Forest | Subtropical/Tropical Dry | suitable | resident |
Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | major | resident |
Forest | Subtropical/Tropical Moist Montane | major | resident |
Rocky areas (eg. inland cliffs, mountain peaks) | suitable | resident | |
Shrubland | Subtropical/Tropical Moist | suitable | resident |
Altitude | 0 - 435 m | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Agriculture & aquaculture | Annual & perennial non-timber crops - Agro-industry farming | Timing | Scope | Severity | Impact | ||||
Past, Unlikely to Return | Majority (50-90%) | Slow, Significant Declines | Past Impact | ||||||
|
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Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
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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 | ||||||
|
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Climate change & severe weather | Storms & flooding | Timing | Scope | Severity | Impact | ||||
Ongoing | Unknown | Unknown | Unknown | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Unspecified species | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
|||||||||
Residential & commercial development | Housing & urban areas | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
Purpose | Scale |
---|---|
Sport hunting/specimen collecting | subsistence |
Recommended citation
BirdLife International (2024) Species factsheet: Chuuk Monarch Metabolus rugensis. Downloaded from
https://datazone.birdlife.org/species/factsheet/chuuk-monarch-metabolus-rugensis 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.