EN
Ethiopian Bushcrow Zavattariornis stresemanni



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
- A3c+4c A3c+4c; B1ab(i,ii,iii,v)

Red List history
Year Category Criteria
2021 Endangered A3c+4c
2016 Endangered A2bc+3bc
2012 Endangered A2bc+3bc+4bc
2008 Endangered A2b,c; A3b,c; A4b,c
2005 Endangered
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

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

Estimate Data quality
Extent of Occurrence (breeding/resident) 7,800 km2 medium
Number of locations 6-10 -
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 10000-19999 mature individuals poor estimated 2011
Population trend decreasing medium inferred 2020-2032
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 3.84 years - - -
Number of subpopulations 1 - - -
Percentage of mature individuals in largest subpopulation 100% - - -

Population justification: Based on nest-counts, and remotely-sensed habitat availability, Donald et al. (2012) estimate a global population of at least 9,000 breeding pairs; however, some areas assessed as suitable do not contain any birds, so this may be an overestimate (A. Bladon in litt. 2016). As active nests typically have several nest-helpers there may be a significant additional non-breeding population. It is placed here in the band 10,000-19,999 mature individuals.

This species has a small range and habitat is not believed to be fragmented. It is therefore assumed that the species functions as one subpopulation.

Trend justification: Climate change modelling predicts that this species will lose 85-96% of its range by 2050 (Bladon et al. 2021). Assuming that the population declines at a similar rate to range loss, this equates to a rate of decline of 52-71% over three generations (11.5 years [Bird et al. 2020]). The rate of decline is therefore placed in the band 50-79%.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Ethiopia extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Ethiopia Yabello Sanctuary

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Subtropical/Tropical Dry major resident
Savanna Dry major resident
Shrubland Subtropical/Tropical Dry major resident
Altitude 1300 - 1800 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 Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Declines Medium Impact: 7
Stresses
Ecosystem degradation
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Ecosystem degradation, Species mortality
Natural system modifications Fire & fire suppression - Supression in fire frequency/intensity Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Stresses
Species disturbance, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Zavattariornis stresemanni. Downloaded from https://datazone.birdlife.org/species/factsheet/ethiopian-bushcrow-zavattariornis-stresemanni on 05/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 05/03/2024.