CR
White-winged Flufftail Sarothrura ayresi



Taxonomy

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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
C2a(i) A2c+3c+4c; C2a(i); D A2c+3c+4c; C2a(i); D1+2

Red List history
Year Category Criteria
2021 Critically Endangered C2a(i)
2018 Critically Endangered C2a(i)
2016 Critically Endangered C2a(i)
2015 Critically Endangered C2a(i)
2013 Critically Endangered C2a(i)
2012 Endangered B1ab(i,ii,iii,iv,v)
2008 Endangered B1a+b(i,ii,iii,iv,v)
2007 Endangered
2006 Endangered
2004 Endangered
2000 Endangered
1996 Endangered
1994 Endangered
1988 Threatened
Species attributes

Migratory status nomadic Forest dependency does not normally occur in forest
Land-mass type continent
Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 200,000 km2 medium
Extent of Occurrence (non-breeding) 183,000 km2 medium
Number of locations 2 -
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 50-249 mature individuals good estimated 2020
Population trend decreasing medium inferred 2012-2022
Rate of change over the past 10 years/3 generations (longer of the two periods) 50-79% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 50-79% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 50-79% - - -
Generation length 3.1 years - - -
Number of subpopulations 2 - - -

Population justification: The population in South Africa was previously estimated to be 235 birds, with at least a further 210-215 pairs in Ethiopia (A. Shimelis in litt. 1998), i.e. probably 700 mature individuals in total. The species can only be reliably surveyed in the breeding season in Ethiopia, but surveys risk disturbing nesting and thus have been avoided in the past (Y. D. Adebe in litt. 2013). Nevertheless, the most recent surveys by Colyn et al. (2020a, b) using cameras and acoustic monitoring yielded upper-limit population densities of 1 pair/5.8 ha in Ethiopia, and 1 pair in 6.7 ha in South Africa. This produced population estimates of 55 pairs in Ethiopia, and c.58 pairs in South Africa, producing a global population estimate of c.226 mature individuals, placed here in the band 50-249 mature individuals.

Trend justification: This species's population is inferred to be decreasing very rapidly in line with levels of disturbance, habitat loss and degradation in Ethiopia and South Africa (Atkinson et al. 1996; Taylor and van Perlo 1998; P. B. Taylor in litt. 1999; De Smidt 2003; Taylor and Grundling 2003; M. Drummond in litt. 2005; Y. Adebe, M. Ewnetu, G. Gebreselassie and H. Smit-Robinson in litt. 2013; Colyn et al. 2020a, c). The rate of decline is therefore suspected to fall in the 50-79% band.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Ethiopia extant native yes
South Africa extant native yes
Zambia extant vagrant
Zimbabwe extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Ethiopia Berga floodplain
Ethiopia Sululta plain
South Africa Franklin Vlei
South Africa Grasslands
South Africa Greater Ingwangwana River
South Africa Ingula Nature Reserve
South Africa Murphy's Rust
South Africa Penny Park
South Africa Steenkampsberg

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Subtropical/Tropical High Altitude major non-breeding
Grassland Subtropical/Tropical High Altitude major breeding
Altitude 1700 - 2600 m Occasional altitudinal limits (min) 1100 m

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%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations - Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Gathering terrestrial plants - Unintentional effects (species is not the target) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Human intrusions & disturbance Work & other activities Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Species disturbance, Reduced reproductive success
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Unspecified species Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Natural system modifications Dams & water management/use - Abstraction of surface water (agricultural use) Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Natural system modifications Dams & water management/use - Dams (size unknown) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Natural system modifications Fire & fire suppression - Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Other options Other threat Timing Scope Severity Impact
Ongoing Whole (>90%) Unknown Unknown
Stresses
Reduced reproductive success, Species mortality
Pollution Agricultural & forestry effluents - Soil erosion, sedimentation Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2024) Species factsheet: White-winged Flufftail Sarothrura ayresi. Downloaded from https://datazone.birdlife.org/species/factsheet/white-winged-flufftail-sarothrura-ayresi on 22/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 22/11/2024.