CR
Baudin's Black-cockatoo Zanda baudinii



Taxonomy

Taxonomic note
Zanda baudinii (del Hoyo and Collar 2014) was previously placed in the genus Calyptorhynchus.

Taxonomic source(s)
Christidis, L. and Boles, W.E. 2008. Systematics and Taxonomy of Australian Birds. CSIRO Publishing, Collingwood, Australia.
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
A2bcde+3cde+4bcde A2bcde+3cde+4bcde A2bcde+3cde+4bcde; C2a(ii)

Red List history
Year Category Criteria
2022 Critically Endangered A2bcde+3cde+4bcde
2016 Endangered A3cde
2012 Endangered C2a(ii)
2008 Endangered C2a(ii)
2005 Endangered
2004 Near Threatened
2000 Lower Risk/Near Threatened
1996 Vulnerable
1994 Vulnerable
1988 Lower Risk/Least Concern
Species attributes

Migratory status full migrant Forest dependency High
Land mass type Land-mass type - Australia
Average mass 620 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 79,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 2500-4000, 3250 poor estimated 2020
Population trend Decreasing poor inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 80-99 - - -
Decline (10 years/3 generation past and future) 80-99 - - -
Number of subpopulations 1 - - -
Percentage in largest subpopulation 100 - - -
Generation length (yrs) 13.24 - - -

Population justification: The population of this species is well monitored by annual counts of roost sites that combined are believed to constitute 90-95% of the species' total population size. From these counts, the total number of Baudin's Black-cockatoos was estimated at 10,000–15,000 individuals in 1995–2004 and 5,000–8,000 in 2017 of which 2,500–4,000 are estimated to be mature individuals (TSSC 2018). Following Johnstone et al. (2021), the best estimate is placed at 3,250 mature individuals.

Trend justification: This species is in steep decline. Monitoring of traditional roost sites in the northern Jarrah-Marri forest (the wintering area for c.95% of the population) has shown precipitous declines over the past three generations (Johnstone & Kirkby 2019, Peck et al. 2019, Johnstone et al. 2021). For example, the Araluen roost declined from 800 birds in 2006, to 0 in 2014 and 2015; at Wungong, numbers declined from 600 in 1998 and 2006, to fewer than 50 in monitoring 2014-2020; counts at Myara declined from 500 in 2007 to fewer than 100 in 2015 (R. Johnstone in litt. 2022). These declines are inferred to relate directly to abundance with these losses not compensated by gains elsewhere. Further evidence is provided from the Darling Scarp and Plateau region, where mixed flocks of Z. baudinii and Z. latirostris (thought to be approximately 70% the former) have been declining at a rate of c.8% per year (Peck et al. 2019). Consequently, the population is inferred to have declined by more than 90% over the past three generations (Johnstone et al. 2021). These declines are projected to continue: nest hollow shortages are causing ongoing poor productivity, while projections of heat, drought and fire all suggest less forest food and fewer sites with accessible drinking water will be available between now and 2062 (Johnstone et al. 2021). Declines are therefore suspected to occur at a similar rate (set here to 80-99%), with no amelioration of the threats facing the species apparent.


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Australia Stirling Range
Australia Araluen-Wungong
Australia Gidgegannup
Australia Mundaring-Kalamunda
Australia North Dandalup
Australia The Lakes (Western Australia)
Australia Jalbarragup

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Temperate major resident
Altitude 0 - 510 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Past, Unlikely to Return Majority (50-90%) Slow, Significant Declines Past Impact
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Past, Unlikely to Return Majority (50-90%) Slow, Significant Declines Past Impact
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Persecution/control Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Climate change & severe weather Droughts 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%) Rapid Declines High Impact: 8
Stresses
Indirect ecosystem effects, Ecosystem degradation
Climate change & severe weather Temperature extremes Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Ecosystem degradation
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Apis mellifera Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Competition, Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Chenonetta jubata Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Competition
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Named species Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Competition
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Polytelis anthopeplus Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Competition
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Unspecified species Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Competition
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Zanda latirostris Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Competition

Recommended citation
BirdLife International (2022) Species factsheet: Zanda baudinii. Downloaded from http://www.birdlife.org on 26/09/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 26/09/2022.