LC
Guadalcanal Rail Hypotaenidia woodfordi



Taxonomy

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.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2022 Least Concern
2016 Near Threatened C2a(ii)
2014 Near Threatened C2a(ii)
Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 6,500 medium
Extent of Occurrence breeding/resident (km2) 5,400
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Unknown poor not applicable -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 1 - - -
Percentage in largest subpopulation 100 - - -
Generation length (yrs) 4.74 - - -

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 distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Solomon Islands N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Solomon Islands Guadalcanal Watersheds

Habitats & altitude
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  

Threats & impact
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
Stresses
Reduced reproductive success, Species mortality
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
Stresses
Species mortality
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
Stresses
Species mortality

Recommended citation
BirdLife International (2023) Species factsheet: Hypotaenidia woodfordi. Downloaded from http://www.birdlife.org on 31/03/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 31/03/2023.