Taxonomic source(s)
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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | C1+2a(ii) |
Year | Category | Criteria |
---|---|---|
2018 | Vulnerable | C1+2a(ii) |
2016 | Vulnerable | C1+2a(ii) |
2012 | Vulnerable | C1+2a(ii) |
2008 | Vulnerable | C1; C2a(ii) |
2004 | Data Deficient | |
2000 | Data Deficient | |
1996 | Vulnerable | |
1994 | Vulnerable | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | High |
Land mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence breeding/resident (km2) | 63,700 | medium |
Number of locations | - | |
Severely Fragmented | - |
Value | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
No. of mature individuals | 2500-9999 | poor | estimated | 2007 |
Population trend | Decreasing | poor | estimated | - |
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) | 10-19 | - | - | - |
Number of subpopulations | 1 | - | - | - |
Percentage in largest subpopulation | 100 | - | - | - |
Generation length (yrs) | 5 | - | - | - |
Population justification: The population is estimated to be in the band 2,500-9,999 mature individuals, equating to 3,750-14,999 individuals in total, rounded here to 3,500-15,000 individuals.
Trend justification: Buchanan et al. (2008) calculated the rate of forest loss within the species's range on New Britain as 16.5% over three generations. Less detailed analysis is available for later years but about 2.2% of forest was lost plus 5.2% degraded across New Britain between 2002 and 2014 (Bryan and Shearman 2015). It is inferred that forest loss and degradation has slowed but the species’ rate of decline is precautionary retained at the rate measured by Buchanan et al. (2008) pending better data.
Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
---|---|---|---|---|---|---|
Papua New Guinea | N | Extant | Yes |
Country/Territory | IBA Name |
---|---|
Papua New Guinea | Gloucester Volcanics |
Papua New Guinea | Gasmata |
Papua New Guinea | Whiteman Range |
Papua New Guinea | Baining Mountains |
Papua New Guinea | East Mengen |
Papua New Guinea | Nakanai Central Pomio |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Forest | Subtropical/Tropical Moist Montane | major | resident |
Altitude | 0 - 1830 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 | ||||
Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
|||||||||
Agriculture & aquaculture | Annual & perennial non-timber crops - Shifting agriculture | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
---|---|---|---|---|---|---|
Pets/display animals, horticulture | - | - | International | Non-trivial | Recent |
Recommended citation
BirdLife International (2022) Species factsheet: Tyto aurantia. Downloaded from
http://www.birdlife.org on 03/07/2022.
Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 03/07/2022.