Data Zone
Taxonomic note
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.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2016 | Least Concern | |
| 2012 | Least Concern | |
| 2009 | Least Concern | |
| 2008 | Least Concern | |
| 2004 | Least Concern | |
| 2000 | Lower Risk/Least Concern | |
| 1994 | Lower Risk/Least Concern | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | medium |
| Land mass type | Average mass | 83 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 1,730,000 | |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | unknown | not applicable | not applicable | 0 |
| Population trend | unknown | not applicable | - | |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | - | - | - | |
| Decline (10 years/3 generation past and future) | - | - | - | |
| Number of subpopulations | - | - | - | |
| Percentage in largest subpopulation | - | - | - | |
| Generation length (yrs) | 4.1 | - | - | - |
Population justification: The global population size has not been quantified, but the species is reported to be numerous (Feare et al. 1998).
Trend justification: The population trend is difficult to determine because of uncertainty over the impacts of habitat modification on population sizes.
| Country/Territory | Presence | Origin | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Guam (to USA) | extant | native | yes | |||
| Micronesia, Federated States of | extant | native | yes | |||
| Northern Mariana Islands (to USA) | extant | native | yes | |||
| Palau | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Guam (to USA) | Cocos Island, Guam |
| Guam (to USA) | Guam National Wildlife Refuge |
| Micronesia, Federated States of | Enipein Watershed |
| Micronesia, Federated States of | Mount Winipot / Tol South |
| Micronesia, Federated States of | Onei Island |
| Micronesia, Federated States of | Pata Island |
| Micronesia, Federated States of | Pilapen Kepin River Watershed |
| Micronesia, Federated States of | Pohnpei Watershed Forest Reserve |
| Micronesia, Federated States of | Polle Island |
| Micronesia, Federated States of | Salapwuk |
| Micronesia, Federated States of | South Weno Ridge |
| Micronesia, Federated States of | Southeast Pohnpei / Nan Madol |
| Micronesia, Federated States of | Uman Island |
| Micronesia, Federated States of | Utwa-Walung Conservation Area |
| Micronesia, Federated States of | Wiya Swiftlet Cave |
| Micronesia, Federated States of | Yap Island |
| Micronesia, Federated States of | Yela River Watershed |
| Northern Mariana Islands (to USA) | Aguiguan Island and Naftan Rock |
| Northern Mariana Islands (to USA) | Alamagan Island |
| Northern Mariana Islands (to USA) | Asuncion Island |
| Northern Mariana Islands (to USA) | Guguan Island |
| Northern Mariana Islands (to USA) | Maug Islands |
| Northern Mariana Islands (to USA) | Northern Saipan |
| Northern Mariana Islands (to USA) | Rota |
| Northern Mariana Islands (to USA) | Sarigan Island |
| Northern Mariana Islands (to USA) | Tinian Island |
| Northern Mariana Islands (to USA) | Topachau-Susupe-Kagman |
| Palau | Middle Ridge, Babeldaob |
| Palau | Ngerutechei, Babeldaob |
| Palau | Peleliu |
| Palau | Rock Islands |
| Palau | Western Ridge, Babeldaob |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | major | resident |
| Forest | Subtropical/Tropical Dry | suitable | resident |
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Shrubland | Subtropical/Tropical Dry | suitable | resident |
| Shrubland | Subtropical/Tropical Moist | suitable | resident |
| Altitude | Occasional altitudinal limits |
Recommended citation
BirdLife International (2023) Species factsheet: Aplonis opaca. Downloaded from
http://datazone.birdlife.org/species/factsheet/micronesian-starling-aplonis-opaca on 07/06/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 07/06/2023.
