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CR
Principe Thrush Turdus xanthorhynchus

IUCN Red List Criteria

Critically Endangered B1ab(ii,iii,v); C2a(ii) 
Endangered B1ab(ii,iii,v); C2a(i,ii); D1 
Vulnerable B1ab(ii,iii,v); C2a(i,ii); D 

IUCN Red List history

Year Category
2013 Critically Endangered
2013 Critically Endangered
2012 Critically Endangered
2011 Critically Endangered
2008 Not Recognised
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) 47 good
Number of locations 1 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 50-249 good Estimated 2010
Population trend Decreasing poor -
Number of subpopulations 2-100 - - -
Largest subpopulation 51-250 - - -
Generation length (yrs) 6.3 - - -
Population justification: Data collected during a survey of Príncipe in 2007 were used to derive a population estimate of 364 individuals (with a 95% confidence interval of 186-887). However, the authors consider this to be an overestimate because the species does not occupy all areas of primary forest and the data may have been biased by the species's confiding nature, thus it is estimated that there are fewer than 250 mature individuals.
Trend justification: The population is suspected to be in decline owing to on-going habitat loss and perhaps hunting pressure, however the rate of decline has not been estimated.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
São Tomé e Príncipe Native Extant       Yes

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Moist Montane major resident
Altitude 0 - 800 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals / Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Stresses
Species mortality
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Unspecified rats (Rattus spp.) Timing Scope Severity Impact
Future Whole (>90%) Very Rapid Declines Medium Impact: 7
Stresses
Reduced reproductive success, Species mortality

Recommended citation
BirdLife International (2014) Species factsheet: Turdus xanthorhynchus. Downloaded from http://www.birdlife.org on 23/09/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/09/2014.

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 Critically Endangered
Family Turdidae (Thrushes)
Species name author Salvadori, 1901
Population size 50-249 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 47 km2
Country endemic? Yes
Links to further information
- Summary information on this species