VU
Seychelles Paradise-flycatcher Terpsiphone corvina



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - D1

Red List history
Year Category Criteria
2020 Vulnerable D1
2016 Critically Endangered B1ab(iii)
2015 Critically Endangered B1ab(iii)
2012 Critically Endangered B1ab(iii)
2010 Critically Endangered B1a+b(iii)
2009 Critically Endangered B1a+b(iii)
2008 Critically Endangered
2004 Critically Endangered
2000 Critically Endangered
1996 Critically Endangered
1994 Critically Endangered
1988 Threatened
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) 160 medium
Extent of Occurrence breeding/resident (km2) 32 good
Number of locations 35-55 -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 350-506 good estimated 2018
Population trend Increasing good estimated -
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 2 - - -
Percentage in largest subpopulation 80-87 - - -
Generation length (yrs) 3.7 - - -

Population justification:

The population is now estimated to number between 350-506 mature individuals across both viable populations (280-436 on La Digue and 70 on Denis Island), with the population believed to be increasing on both islands (Bristol et al. 2018, Bristol and Gamatis 2017). Translocations to a third island, Curieuse, began in December 2018. 

Trend justification:

The overall population is steadily increasing. Territories on the main La Digue western plateau continue to decline due to habitat loss from development, but this decline is slowing, and is offset by the increase in territories off plateau on La Digue. Additionally, the established population on Denis island is now viable, and is increasing also (Bristol, 2016; Gamatis and Bristol, 2018).


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Seychelles La Digue island
Seychelles Anse Source d'Argent-Anse Marron
Seychelles Grand Anse-Petite Anse-Fond Piment
Seychelles Denis Island
Seychelles Félicité Island
Seychelles La Veuve Special Reserve

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable resident
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) 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 - Felis catus Timing Scope Severity Impact
Past, Unlikely to Return Majority (50-90%) Slow, Significant Declines Past Impact
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Pistia stratiotes Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Rattus rattus Timing Scope Severity Impact
Past, Unlikely to Return Majority (50-90%) Slow, Significant Declines Past Impact
Stresses
Reduced reproductive success
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Unspecified species Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Residential & commercial development Tourism & recreation areas Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2022) Species factsheet: Terpsiphone corvina. Downloaded from http://www.birdlife.org on 29/11/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/11/2022.