Data Zone
Taxonomic note
Carpococcyx radiceus (del Hoyo and Collar 2014) was previously listed as C. radiatus.
Taxonomic source(s)
Collar, N. J.; Long, A. J. 1995. Taxonomy and names of Carpococcyx cuckoos from the Greater Sundas. Forktail 11: 135-150.
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 |
|---|---|---|
| - | - | A2c+3c+4c |
| Year | Category | Criteria |
|---|---|---|
| 2022 | Vulnerable | A2c+3c+4c |
| 2016 | Near Threatened | A2c+3c+4c |
| 2013 | Near Threatened | A2c+3c+4c |
| 2012 | Near Threatened | A2c+3c+4c |
| 2008 | Near Threatened | A2c; A3c; A4c |
| 2004 | Near Threatened | |
| 2000 | Lower Risk/Near Threatened | |
| 1996 | Vulnerable | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | not a migrant | Forest dependency | high |
| Land-mass type |
shelf island |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 850,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | poor | suspected | 2016-2034 |
| Rate of change over the past 10 years/3 generations (longer of the two periods) | 40-49% | - | - | - |
| Rate of change over the future 10 years/3 generations (longer of the two periods) | 40-49% | - | - | - |
| Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 40-49% | - | - | - |
| Generation length | 6 years | - | - | - |
| Number of subpopulations | 2-100 | - | - | - |
| Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: The global population size has not been quantified. Although it is widespread across Borneo, it has very specific habitat requirements and is largely considered scarce to rare. For example, in Sungai Wain Protection Forest, east Kalimantan, it was encountered just 32 times in 44 months of survey effort (Fredriksson and Nijman 2004). Given its specific habitat requirements and apparent low density, generating an accurate population estimate for this species is a priority.
Trend justification: This lowland forest specialist is suspect to be declining rapidly because of pervasive forest loss within its range which largely has consisted of total clearance or conversion to oil palm plantations, neither of which this species persists in. Forest cover loss in its elevational and geographic range over the past three generations (18 years; Bird et al. 2020) has been approximately 36-40% (Global Forest Watch [2021] using data from Hansen et al. [2013] and methods disclosed therein), increasing fractionally to a rate of c.41% in the period 2016-2020. This latter rate is suspected to continue into the future with little sign of abatement. As a forest dependent species, this is the absolute minimum suspected population reduction. In addition, degradation and fragmentation is suspected to have driven further reduction, though this is unquantified. Consequently, the species is suspected to have declined, and to continue to decline, by 40-49% over three generations.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Brunei | extant | native | yes | |||
| Indonesia | extant | native | yes | |||
| Malaysia | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Malaysia | Dulit Range |
| Malaysia | Kinabatangan floodplain |
| Malaysia | Mulu - Buda Protected Area |
| Malaysia | Similajau National Park |
| Malaysia | Tanjung Datu-Samunsam Protected Area |
| Malaysia | Usun Apau plateau |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Forest | Subtropical/Tropical Moist Montane | suitable | resident |
| Altitude | 0 - 500 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 | ||||||
|
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| Biological resource use | Hunting & trapping terrestrial animals - Unintentional effects (species is not the target) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Rapid Declines | Medium Impact: 7 | ||||||
|
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| Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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Recommended citation
BirdLife International (2024) Species factsheet: Bornean Ground-cuckoo Carpococcyx radiceus. Downloaded from
https://datazone.birdlife.org/species/factsheet/bornean-ground-cuckoo-carpococcyx-radiceus 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.