VU
Carunculated Fruit-dove Ptilinopus granulifrons



Taxonomy

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.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - B1ab(ii,iii,iv)+2ab(ii,iii,iv)

Red List history
Year Category Criteria
2023 Vulnerable B1ab(ii,iii,iv)+2ab(ii,iii,iv)
2016 Vulnerable C2a(ii)
2012 Vulnerable C2a(ii)
2008 Vulnerable C2a(ii)
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency medium
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 2,900 km2 medium
Area of Occupancy (breeding/resident) 1,800 km2
Number of locations 6-20 -
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 2500-9999 mature individuals poor suspected 2023
Population trend decreasing poor suspected 2017-2029
Rate of change over the past 10 years/3 generations (longer of the two periods) 15-25% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 15-25% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 15-25% - - -
Generation length 4.04 years - - -
Number of subpopulations 1 - - -
Percentage of mature individuals in largest subpopulation 100% - - -

Population justification: The population size of this species has not been formally estimated. It is described as 'scarce' by Lambert (1994) and 'uncommon' by Eaton et al. (2021) but is an elusive species that is easily overlooked (Bashari 2011, Mittermeier et al. 2013). Nonetheless, with only 1,200 km2 of forest within its range (per Global Forest Watch 2023), and suggestion that it is uncommon, it is possible that its population size is relatively small. Precautionarily, the population size is therefore placed in the bracket of 2,500-10,000 mature individuals, but this requires confirmation.

Trend justification: This species is believed to be strictly dependent on lowland forest (Eaton et al. 2021). In the three generations (c.12 years; Bird et al. 2020) to 2022, forest cover in this species' mapped range reduced by 15% (Global Forest Watch 2023, based on data from Hansen et al. [2013] and methods disclosed therein). Although it is at least somewhat tolerant of degradation, most habitat losses on Obi have amounted to total clearance to make way for mines and large-scale plantations. As a frugivore, that appears to be at least partially nomadic, it may depend on a network of feeding sites that vary spatially and temporally, making it especially vulnerable to habitat losses. Moreover, as a large-bodied species, it may be subject to some hunting pressure, although this species is elusive and other large-bodied species (e.g. other pigeons) on Obi are relatively common; hence hunting is considered only a minor threat. Overall the species is suspected to have declined by 15-25% over the past three generations, and the same rate is precautionarily suspected to occur in the future, with no mitigation of threats apparent and none of Obi's lowland forests protected (UNEP-WCMC and IUCN 2023).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Indonesia extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Indonesia Gunung Batu Putih

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Shrubland Subtropical/Tropical Moist suitable resident
Altitude 0 - 550 m Occasional altitudinal limits  

Threats & impact
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
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
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
Stresses
Species mortality
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
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Scale
Food - animal subsistence

Recommended citation
BirdLife International (2024) Species factsheet: Carunculated Fruit-dove Ptilinopus granulifrons. Downloaded from https://datazone.birdlife.org/species/factsheet/carunculated-fruit-dove-ptilinopus-granulifrons on 22/11/2024.
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 22/11/2024.