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Chuuk Monarch Metabolus rugensis

IUCN Red List Criteria

Critically Endangered  
Endangered C2a(ii) 
Vulnerable A2c+3c+4c;C2a(i,ii);D1 

IUCN Red List history

Year Category
2012 Endangered
2008 Endangered
2004 Endangered
2000 Endangered
1996 Endangered
1994 Endangered
1988 Threatened

Species attributes

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

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 80 medium
Number of locations 11-100 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 600-1700 medium Estimated 1994
Population trend Decreasing poor -
Number of subpopulations 1 - - -
Largest subpopulation 600-1700 - - -
Generation length (yrs) 4.2 - - -
Population justification: The population estimate of 1,000-2,499 individuals is derived from Engbring et al. (1990) and H. D. Pratt in litt. (1994). This equates to 667-1,666 mature individuals, rounded here to 600-1,700 mature individuals.
Trend justification: A population estimate in 2001 (G. Dutson in litt. 2003) suggested that the species had declined from the 1984 estimate (Engbring et al. 1990). The species is now thought 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). Furthermore, it was not recorded in an area on Dublon Island in December 2010 where it had been seen in December 2008 (D. Scott in litt. 2011). On the basis of this information the population is suspected to be in rapid decline overall.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage
Micronesia, Federated States of Native Extant      

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Micronesia, Federated States of Mount Winipot / Tol South site factsheet

Habitats & altitude

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  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2014) Species factsheet: Metabolus rugensis. Downloaded from http://www.birdlife.org on 22/07/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/07/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Endangered
Family Monarchidae (Monarchs)
Species name author (Hombron & Jacquinot, 1841)
Population size 600-1700 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 80 km2
Country endemic? Yes
Links to further information
- Summary information on this species