EN
Whistling Warbler Catharopeza bishopi



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
- B1ab(i,ii,iii) B1ab(i,ii,iii); D2

Red List history
Year Category Criteria
2020 Endangered B1ab(i,ii,iii)
2016 Endangered B1ab(i,ii,iii,v); C2a(ii)
2012 Endangered B1ab(i,ii,iii,v)
2008 Endangered B1a+b(i,ii,iii,v)
2004 Endangered
2000 Endangered
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

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

Estimate Data quality
Extent of Occurrence (breeding/resident) 140 km2 medium
Number of locations 2-5 -
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 2000-3300 mature individuals good estimated 1986
Population trend decreasing poor suspected 2014-2024
Rate of change over the past 10 years/3 generations (longer of the two periods) 1-9% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 1-9% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 1-9% - - -
Generation length 2.44 years - - -
Number of subpopulations 1 - - -
Percentage of mature individuals in largest subpopulation 100% - - -

Population justification: The population is estimated to number 3,000-5,000 individuals, roughly equating to 2,000-3,300 mature individuals.

Trend justification: There are no new data on population trends; however, the species is suspected to be declining at a slow rate, since habitat encroachment is likely to be on-going.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
St Vincent and the Grenadines extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
St Vincent and the Grenadines Richmond Forest Reserve
St Vincent and the Grenadines Cumberland Forest Reserve
St Vincent and the Grenadines Dalaway (Buccament) Watershed
St Vincent and the Grenadines Kingstown Forest Reserve
St Vincent and the Grenadines Colonarie Forest Reserve
St Vincent and the Grenadines Mount Pleasant Forest Reserve
St Vincent and the Grenadines La Soufrière National Park

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Moist Montane suitable resident
Altitude 300 - 1100 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops - Shifting agriculture Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation
Geological events Volcanoes Timing Scope Severity Impact
Past, Likely to Return Majority (50-90%) Slow, Significant Declines Past Impact
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Catharopeza bishopi. Downloaded from https://datazone.birdlife.org/species/factsheet/whistling-warbler-catharopeza-bishopi on 03/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 03/03/2024.