Taxonomic note
Otidiphaps nobilis, O. aruensis, O. cervicalis and O. insularis (del Hoyo and Collar 2014) were previously lumped as O. nobilis following Sibley and Monroe (1990, 1993).
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) | C2a(i,ii); D | C2a(i,ii); D1 |
Year | Category | Criteria |
---|---|---|
2021 | Critically Endangered | C2a(ii) |
2016 | Endangered | C2a(ii) |
2014 | Endangered | C2a(ii) |
2012 | Not Recognised | |
2008 | Not Recognised | |
2004 | Not Recognised | |
2000 | Not Recognised | |
1994 | Not Recognised | |
1988 | Not Recognised |
Migratory status | not a migrant | Forest dependency | high |
Land-mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 1,700 km2 | medium |
Area of Occupancy (breeding/resident) | 1,604 km2 | |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 50-249 mature individuals | poor | estimated | 2021 |
Population trend | decreasing | - | inferred | 2020-2040 |
Rate of change over the past 10 years/3 generations (longer of the two periods) | 5-15% | - | - | - |
Rate of change over the future 10 years/3 generations (longer of the two periods) | 5-24% | - | - | - |
Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 5-24% | - | - | - |
Generation length | 6.78 years | - | - | - |
Number of subpopulations | 1 | - | - | - |
Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification:
There is no estimate of the population density of any Otidiphaps sp., but a handful of calling O. nobilis have been heard calling per square kilometre in suitable hill forest at Varirata National Park (G. Dutson pers. comm. 2016). An analysis of satellite forest cover data suggested that there was 1,140 km2 of forest in the range of O. insularis in 2021 (Global Forest Watch 2021). Based on this information, the maximum population size may be estimated to number up to several thousand mature individuals. However, there have been no recent sightings of the species despite recent visits from researchers and birdwatchers (Gregg et al. 2020, J. Bergmark in litt. 2021), and surveys of the Kilkerran Massif in 2019 failed to record the species (Gregg et al. 2020), which suggests that the population size may now be extremely small. Nevertheless, local people have recently reported hunting the species and finding an active nest (Gregg et al. 2020), which suggests that the species persists in low numbers. The population size is therefore estimated to be smaller than 250 mature individuals, and is here placed in the band 50-249 mature individuals.
Given the species's small range with contiguous habitat, there is assumed to be a single subpopulation.
Trend justification: The species is inferred to be undergoing a slow decline owing to the loss of its forest habitat, which is subject to pressure for logging and conversion for subsistence agriculture. An analysis of satellite forest cover data indicated that forest was being lost in the species's range at a rate equivalent to 10% over three generations over the period of 2001-2019, with significantly higher rates seen since 2014 (Global Forest Watch 2021). Extrapolating into the future, it is suspected that 10-19% of tree cover may be lost over the next three generations. Hunting is also likely to be contributing to declines. The species's population size is therefore suspected to have undergone a reduction of 5-15% over the past three generations, and to undergo a reduction of 5-24% over the next three generations.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Papua New Guinea | extant | native | yes |
Country/Territory | IBA Name |
---|
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Forest | Subtropical/Tropical Moist Montane | major | resident |
Altitude | 0 - 2050 m | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
Ongoing | Whole (>90%) | Unknown | Unknown | ||||||
|
|||||||||
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 | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Felis catus | Timing | Scope | Severity | Impact | ||||
Unknown | Whole (>90%) | Unknown | Unknown | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Rattus exulans | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Unknown | Unknown | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Rattus norvegicus | Timing | Scope | Severity | Impact | ||||
Future | Whole (>90%) | Unknown | Unknown | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Rattus rattus | Timing | Scope | Severity | Impact | ||||
Unknown | Whole (>90%) | Unknown | Unknown | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Sus scrofa | Timing | Scope | Severity | Impact | ||||
Ongoing | Whole (>90%) | Unknown | Unknown | ||||||
|
Purpose | Scale |
---|---|
Food - human | subsistence |
Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Black-naped Pheasant-pigeon Otidiphaps insularis. Downloaded from
https://datazone.birdlife.org/species/factsheet/black-naped-pheasant-pigeon-otidiphaps-insularis on 23/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/11/2024.