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 |
---|---|---|
2022 | Vulnerable | C2a(ii) |
2016 | Vulnerable | C2a(ii) |
2012 | Vulnerable | C2a(ii) |
2008 | Vulnerable | C2a(ii) |
2004 | Vulnerable | |
2000 | Vulnerable | |
1996 | Vulnerable | |
1994 | Vulnerable | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | High |
Land mass type |
Land-mass type - shelf island |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence breeding/resident (km2) | 1,200,000 | medium |
Number of locations | - | |
Severely Fragmented | - |
Value | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
No. of mature individuals | 3200-4000 | medium | estimated | 2016 |
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) | 10-19 | - | - | - |
Decline (10 years/3 generation past and future) | 10-19 | - | - | - |
Number of subpopulations | 1 | - | - | - |
Percentage in largest subpopulation | 100 | - | - | - |
Generation length (yrs) | 9.94 | - | - | - |
Population justification: Based on a territory mapping exercise in the extensive Crater Mountain Wildlife Management Area (comprising, at the time, of c.85% montane forest and c.15% cultivation), Watson and Asoyama (2001) estimated a suitable density of one pair (= two mature individuals) per 150 km2 of forest (accounting both for density and occupancy). Bryan et al. (2015) suggested an area of suitable rainforest habitat of c.250,000 km2 exists on New Guinea, suggesting a total population size of 1,600 pairs. However, since the Crate Wildlife Management Area contains habitat not suitable, and the species has also been recorded (albeit at low densities) in monsoon forest, the population is perhaps higher. Consequently, the population size of this species is estimated at 1,600-2,000 pairs, or 3,200-4,000 mature individuals.
Trend justification: Based on data between 2000 and 2021 (Global Forest Watch 2022, based on methods and data from Hansen et al. [2013]), forest cover is estimated to have been reduced in this species' range by c.7-9% in the three generation period (c.30 years; Bird et al. 2020) to 2021. Given this species' forest dependence, this is thought to have caused a reduction in population size at least equal. Hunting remains a key threat to this species in areas close to villages (Watson and Asoyama 2001) and this is thought to have additive impacts, such that the population is suspected of declining at an ongoing rate of 10-19% over three generations.
Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
---|---|---|---|---|---|---|
Indonesia | N | Extant | Yes | |||
Papua New Guinea | N | Extant | Yes |
Country/Territory | IBA Name |
---|---|
Indonesia | Bernhard |
Papua New Guinea | Lakekamu Basin |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Forest | Subtropical/Tropical Moist Montane | major | resident |
Savanna | Dry | suitable | resident |
Shrubland | Subtropical/Tropical Moist | suitable | resident |
Altitude | 0 - 2000 m | Occasional altitudinal limits | (max) 3700 m |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Agriculture & aquaculture | Annual & perennial non-timber crops - Shifting agriculture | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | 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 | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
---|---|---|---|---|---|---|
Handicrafts, jewellery, etc. | - | - | Non-trivial | Recent |
Recommended citation
BirdLife International (2023) Species factsheet: Harpyopsis novaeguineae. Downloaded from
http://www.birdlife.org on 27/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 27/03/2023.