EW
Guam Rail Hypotaenidia owstoni



Taxonomy

Taxonomic note
Hypotaenidia owstoni (del Hoyo and Collar 2014) was previously placed in the genus Gallirallus.

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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

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

Red List history
Year Category Criteria
2016 Extinct in the Wild
2012 Extinct in the Wild
2010 Extinct in the Wild
2008 Extinct in the Wild
2004 Extinct in the Wild
2000 Extinct in the Wild
1996 Extinct in the Wild
1994 Extinct in the Wild
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency Low
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 0
Population trend 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 - - -
Largest subpopulations - - -
Generation length (yrs) 3.4 - - -

Population justification: No extant population remains in the wild.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Guam (to USA) N Extinct Yes
Northern Mariana Islands (to USA) I Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Guam (to USA) Cocos Island, Guam
Guam (to USA) Guam National Wildlife Refuge

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Pastureland suitable resident
Forest Subtropical/Tropical Moist Lowland suitable resident
Grassland Subtropical/Tropical Dry suitable resident
Savanna Dry suitable resident
Shrubland Subtropical/Tropical Dry suitable resident
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases Timing Scope Severity Impact
Ongoing Unknown Rapid Declines Unknown
Stresses
Species mortality

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets Whole Adults and juveniles Wild International Non-trivial Historical

Recommended citation
BirdLife International (2019) Species factsheet: Hypotaenidia owstoni. Downloaded from http://www.birdlife.org on 19/04/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/04/2019.