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 |
---|---|---|
- | - | C2a(ii) |
Year | Category | Criteria |
---|---|---|
2021 | Vulnerable | C2a(ii) |
2018 | Vulnerable | C2a(i) |
2016 | Vulnerable | C2a(i) |
2012 | Vulnerable | C2a(i) |
2008 | Vulnerable | C1; C2a(i) |
2004 | Vulnerable | |
2000 | Vulnerable | |
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) | 69,200 | medium |
Number of locations | - | |
Severely Fragmented | - |
Value | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
No. of mature individuals | 2500-9999 | medium | estimated | 2010 |
Population trend | Decreasing | poor | inferred | - |
Decline (3 years/1 generation past) | - | - | - | |
Decline (5 years/1 generation past) | - | - | - | |
Decline (10 years/1 generation past) | - | - | - | |
Decline (10 years/3 generation future) | 1-9 | - | - | - |
Decline (10 years/3 generation past and future) | 1-9 | - | - | - |
Number of subpopulations | 1 | - | - | - |
Percentage in largest subpopulation | 100 | - | - | - |
Generation length (yrs) | 4.48 | - | - | - |
Population justification: There have been few records, despite several surveys taking place in New Britain (Lecroy & Peckover 1983, Bishop & Jones 2001, Davis et al. 2018), suggesting that the species is localised and occurs at low population densities. From 415 hours of survey effort in New Britain in 1997-1998 and in 2010, the species was only observed once (Davis et al. 2018). However, it was recorded on four out of 13 days of surveys in forest on New Ireland (Beehler et al. 2001), so it may be more common in montane forest there, although the area of habitat is much smaller than on New Britain. Based on the area of habitat, the population has been estimated as 2,500-10,000 mature individuals (Buchanan et al. 2008, Davis et al. 2018), although it may be smaller (Davis et al. 2018).
Since congeners have been recorded crossing between islands (Mayr and Diamon 2001), the species is expected to be able to cross the 25 km between New Britain and New Ireland, and so is considered to have a single subpopulation (Davis et al. 2018).
Trend justification: Remote-sensed data on tree cover indicates that approximately 7% of tree cover with at least 50% canopy cover was lost within the species's mapped range over three generations (13 years) from 2006-2019 (Global Forest Watch 2020). Since the species is thought to have a high level of forest dependency (Buchanan et al. 2008), it is inferred that the population size is undergoing a continuing decline. The impact on the species's population size is not known, but based on the rate of deforestation, the species is suspected to have undergone a reduction of 1-9% over the past three generations. Assuming deforestation continues at a similar rate into the future, the species is suspected to undergo a similar reduction in population size over the next three generations.
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 | Arawe |
Papua New Guinea | Whiteman Range |
Papua New Guinea | Baining Mountains |
Papua New Guinea | Nakanai Central Pomio |
Papua New Guinea | Lelet Plateau |
Papua New Guinea | Cape St George (Last Corner) |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Forest | Subtropical/Tropical Moist Montane | major | resident |
Altitude | 0 - 1800 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%) | Rapid Declines | Medium Impact: 6 | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
|||||||||
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 | ||||||
|
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: Accipiter brachyurus. Downloaded from
http://www.birdlife.org on 26/06/2022.
Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 26/06/2022.