Data Zone
Taxonomic source(s)
Christidis, L. and Boles, W.E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.
Christidis, L.; Boles, W. E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | C2a(i) |
| Year | Category | Criteria |
|---|---|---|
| 2016 | Near Threatened | C2a(i);D1 |
| 2012 | Near Threatened | C2a(i);D1 |
| 2008 | Vulnerable | D1 |
| 2006 | Vulnerable | |
| 2004 | Vulnerable | |
| 2000 | Vulnerable | |
| 1996 | Endangered | |
| 1994 | Endangered | |
| 1988 | Threatened |
| Migratory status | not a migrant | Forest dependency | Medium |
| Land mass type |
Land-mass type - Australia |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 4,030,000 | medium |
| Number of locations | 11-100 | - |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 1400 | medium | estimated | 2010 |
| Population trend | Decreasing | medium | 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) | - | - | - | |
| Decline (10 years/3 generation past and future) | - | - | - | |
| Number of subpopulations | 3 | - | - | - |
| Percentage in largest subpopulation | 1-89 | - | - | - |
| Generation length (yrs) | 7.6 | - | - | - |
Population justification:
Because of its inconspicuousness, it is difficult to estimate the size of the population anywhere within the species range. Consequently we can only be confident in population estimates for just two regions: the Tiwi Islands where there are c.100 (unlikely to be isolated but probably a separate subpopulation) and SE Qld/ NE NSW where there are c.0. The loss of the South-east Queensland population (10-30 pairs) reduces previous population estimates in Queensland to up to 125 pairs. Considering the unknowns around these estimates, combined with a paucity of knowledge on current population trends in most regions, an estimated population size of <500 pairs appears more likley than the 700 pairs estimated in Garnett et al. 2011 (Seaton, R. in litt. 2016).
Trend justification: The population may be declining owing to habitat loss in at least eastern Queensland; the rate of decline has not been quantified but is not suspected to be rapid (Garnett et al. 2011).
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Australia | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Australia | Tiwi Islands |
| Australia | Lilyvale |
| Australia | Kakadu Savanna |
| Australia | Mornington Sanctuary |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Lowland | suitable | resident |
| Forest | Subtropical/Tropical Swamp | suitable | resident |
| Forest | Temperate | suitable | resident |
| Savanna | Dry | suitable | resident |
| Altitude | 0 - 1000 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Livestock farming & ranching - Agro-industry grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Agriculture & aquaculture | Wood & pulp plantations - Scale Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
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| Biological resource use | Hunting & trapping terrestrial animals - Persecution/control | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Causing/Could cause fluctuations | Low Impact: 5 | ||||||
|
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| Natural system modifications | Fire & fire suppression - Trend Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Pollution | Agricultural & forestry effluents - Herbicides and pesticides | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
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Recommended citation
BirdLife International (2022) Species factsheet: Erythrotriorchis radiatus. Downloaded from
http://www.birdlife.org on 27/06/2022.
Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 27/06/2022.
