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Calayan Rail  Gallirallus calayanensis

IUCN Red List Criteria

Critically Endangered  
Endangered  
Vulnerable D2 

IUCN Red List history

Year Category
2012 Vulnerable
2011 Vulnerable
2008 Vulnerable
2005 Vulnerable
2004 Not Recognised
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised

Species attributes

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

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 70 good
Area of Occupancy breeding/resident (km2) 36 good
Number of locations 1 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 2500-4300 good Estimated 2012
Population trend Stable medium -
Number of subpopulations - - -
Largest subpopulation - - -
Generation length (yrs) 3.4 - - -
Population justification: Allen et al. (2004), estimated 100-200 pairs. It has since been found to be locally common, with an estimated area of occupancy of 36 km2. Latest estimates based on species distribution modelling and known densities put the population size at 3,800-6,500 individuals (C. Layusa and C. Oliveros in litt. 2012), equating to 2,500-4,300 mature individuals.
Trend justification: The population is suspected to be stable in the absence of evidence for any substantial declines or threats.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Philippines Native Extant Yes      

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 0 - 0 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 Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Domestic Cat (Felis catus) Timing Scope Severity Impact
Future Majority (50-90%) Rapid Declines Low Impact: 5
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Domestic Dog (Canis familiaris) Timing Scope Severity Impact
Future Majority (50-90%) Rapid Declines Low Impact: 5
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Unspecified rats (Rattus spp.) Timing Scope Severity Impact
Future Majority (50-90%) Rapid Declines Low Impact: 5
Stresses
Reduced reproductive success
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Future Majority (50-90%) Slow, Significant Decline Low Impact: 4
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2014) Species factsheet: Gallirallus calayanensis. Downloaded from http://www.birdlife.org on 28/08/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 28/08/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Vulnerable
Family Rallidae (Rails, Gallinules, Coots)
Species name author Allen, Oliveros, Espanola, Broad & Gonzalez, 2004
Population size 2500-4300 mature individuals
Population trend Stable
Distribution size (breeding/resident) 70 km2
Country endemic? Yes
Links to further information
- Summary information on this species