Data Zone
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 |
|---|---|---|
| B1ab(i,ii,iii,iv,v); C2a(ii) | B1ab(i,ii,iii,iv,v); C2a(i,ii); D | B1ab(i,ii,iii,iv,v); C2a(i,ii); D1+2 |
| Year | Category | Criteria |
|---|---|---|
| 2016 | Critically Endangered | B1ab(i,ii,iii,iv,v); C2a(ii) |
| 2013 | Critically Endangered | B1ab(i,ii,iii,iv,v);C2a(ii) |
| 2012 | Critically Endangered | B1ab(i,ii,iii,iv,v);C2a(ii) |
| 2009 | Critically Endangered | B1a+b(i,ii,iii,iv,v); C2a(ii) |
| 2008 | Critically Endangered | |
| 2004 | Critically Endangered | |
| 2000 | Critically 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 (km2) | 14 | medium |
| Number of locations | 1 | - |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 70-130 | medium | estimated | 1995 |
| Population trend | decreasing | poor | suspected | - |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | 10-19 | - | - | - |
| Decline (10 years/3 generation past and future) | 10-19 | - | - | - |
| Number of subpopulations | 1 | - | - | - |
| Percentage in largest subpopulation | 100 | - | - | - |
| Generation length (yrs) | 4.3 | - | - | - |
Population justification: The population is estimated to number 100-200 individuals, roughly equating to 70-130 mature individuals.
Trend justification: Forest loss has reportedly decimated the ecology of Boano island. Continuing encroachment is likely to be driving a moderate and on-going decline in this species.
| Country/Territory | Presence | Origin | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Indonesia | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Indonesia | Pulau Buano |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Shrubland | Subtropical/Tropical Moist | suitable | resident |
| Altitude | 150 - 500 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops - Scale Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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| Agriculture & aquaculture | Livestock farming & ranching - Agro-industry grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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Recommended citation
BirdLife International (2023) Species factsheet: Symposiachrus boanensis. Downloaded from
http://datazone.birdlife.org/species/factsheet/black-chinned-monarch-symposiachrus-boanensis on 29/05/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 29/05/2023.
