EN
Ethiopian Bushcrow Zavattariornis stresemanni



Taxonomy

Taxonomic note

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.
Dowsett, R. J.; Forbes-Watson, A. D. 1993. Checklist of birds of the Afrotropical and Malagasy regions. Tauraco Press, Li
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- A2bc+3bc A2bc+3bc; B1ab(ii,iii,v)

Red List history
Year Category Criteria
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 Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 7,800 medium
Number of locations 6-10 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 10000-19999 poor estimated 2011
Population trend Decreasing medium 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) 50-79 - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 1 - - -
Largest subpopulations 100 - - -
Generation length (yrs) 6.7 - - -

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.

Trend justification: Encounter rates in the Yavello Wildlife Sanctuary declined by 80% between 1989 and 2003 (Borghesio and Giannetti 2005), which covers a large part of the species's range, and declines are presumed to be continuing, owing to on-going habitat conversion and degradation. The overall rate of decline is estimated to be very rapid. More recent studies suggest that the species's population in fact may be stable (P. Donald in litt. 2012), however a rapid ongoing decline is retained here until this can be confirmed; and the species is suspected to be vulnerable to climate change (Bladon et al. in prep.).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Ethiopia N Extant 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 Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Ecosystem degradation
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Declines Medium Impact: 7
Stresses
Ecosystem degradation, Species mortality
Natural system modifications Fire & fire suppression Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
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%) Slow, Significant Declines Medium Impact: 6
Stresses
Species disturbance, Ecosystem conversion

Recommended citation
BirdLife International (2017) Species factsheet: Zavattariornis stresemanni. Downloaded from http://www.birdlife.org on 16/12/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 16/12/2017.