Data Zone
Taxonomic note
Hypotaenidia woodfordi, H. tertia and H. immaculata (del Hoyo and Collar 2014) were previously previously placed in the genus Nesoclopeus and lumped as N. woodfordi 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 |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2022 | Least Concern | |
| 2016 | Near Threatened | C2a(ii) |
| 2014 | Near Threatened | 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 | medium |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 6,500 km2 | medium |
| Area of Occupancy (breeding/resident) | 5,400 km2 | |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | unknown | poor | - | 1998-2008 |
| Generation length | 4.74 years | - | - | - |
| Number of subpopulations | 1 | - | - | - |
| Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification: The population was previously suspected to number 2,500-9,999 mature individuals, although there was no real basis for this figure. The population is here considered unknown until surveys are carried out, however it is apparently quite common in damp rank grassy areas left after logging based on playback responses (J. Wood pers. comm. 2020), even in areas with a high abundance of stray dogs.
Trend justification: The population trend is poorly known, but suspected to be stable or perhaps increasing. This species apparently thrives in damp grassy areas left after logging (J. Wood pers. comm. 2020), which is ongoing (albeit at a slow rate) in the lowlands of Guadalcanal (Global Forest Watch [2021] using the methods of Hansen et al. [2013] disclosed therein). Given its apparent co-existence with a high density of stray dogs (J. Wood pers. comm. 2020) there is no reason to suspect these are driving a continuing decline. However, this trend should be confirmed using survey data.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Solomon Islands | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Solomon Islands | Guadalcanal Watersheds |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Rural Gardens | suitable | resident |
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Forest | Subtropical/Tropical Swamp | suitable | resident |
| Grassland | Subtropical/Tropical Seasonally Wet/Flooded | suitable | resident |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | suitable | resident |
| Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | suitable | resident |
| Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | suitable | resident |
| Altitude | 0 - 600 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Biological resource use | Hunting & trapping terrestrial animals - Unintentional effects (species is not the target) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Canis familiaris | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | No decline | 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 | ||||
| Ongoing | Majority (50-90%) | No decline | Low Impact: 5 | ||||||
|
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Recommended citation
BirdLife International (2024) Species factsheet: Guadalcanal Rail Hypotaenidia woodfordi. Downloaded from
https://datazone.birdlife.org/species/factsheet/guadalcanal-rail-hypotaenidia-woodfordi on 20/12/2024.
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 20/12/2024.