• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	A2bc+3c+4bc

Red List history

Year	Category	Criteria
2022	Vulnerable	A2bc+3c+4bc
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1996	Vulnerable
1994	Vulnerable
1988	Lower Risk/Least Concern

Migratory status	not a migrant	Forest dependency	high
Land-mass type	Australia	Average mass	437 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,010,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	7000-14000 mature individuals	poor	suspected	2020
Population trend	decreasing	-	inferred	2003-2039
Rate of change over the past 10 years/3 generations (longer of the two periods)	30-40%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	30-40%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	30-40%	-	-	-
Generation length	11.9 years	-	-	-
Number of subpopulations	3	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: Using density and occupancy estimates, the population sizes of C. l. lathami and C. l. halmaturinus have been estimated at 6,000-10,500 (best estimate 7,500) and 230-290 (best estimate 250) mature individuals respectively. The population of C. l. erebus, however, has not been estimated. Based on areas of suitable habitat, it is suspected to number c.2,000 mature individuals, however there is substantial uncertainty with this. Combining these and account for these uncertainties, the total population is suspected to number 7,000-14,000 mature individuals.

Trend justification:

Data are inconsistent (both in their trend and reliability) across the three subspecies.

Trend data for C. l. lathami up to 2019 indicate rapid declines over the past three generations. Reporting rates from 500-m radius area searches across their range, arguably the most reliable of the available survey methods for the species, declined by 59% from 1999–2019, equivalent to a decline of 79% in three generations. However, there was no significant change in reporting rates between 1977–1981 and 1998–2001 either nationally (Barrett et al. 2002), or in New South Wales (Barrett et al. 2007) and the 2-ha 20-min survey data from 1999–2019 (BirdLife Australia 2020) was too variable to provide a reliable trend. Similarly, the reporting rates derived from an annual Glossy Black-Cockatoo birding day event held since 2010 across south-eastern Queensland and far north-eastern New South Wales revealed that these are stable with no significant decline over from 2010–2017 (Cameron et al. 2021). 

The population size and trend of C. l. erebus has not been estimated. Although the population has expanded its range to the Wet Tropics in the past 20 years (Garnett et al. 1999), high quality habitat at Eungella was badly burned in recent fires. Overall, the population of this taxon is believed to be comparatively small and probably stable (S. Garnett in litt. 2021).

The population of C. l. halmaturinus is tiny, hence although it has increased in the last three generations and effective management is expected to maintain the trajectory, its trend is unlikely to disrupt or affect the global trend.

Combining these analyses, Garnett & Baker (2021) inferred that the global rate of decline of this species is >30% over the past three generations and this is accepted here. Given the ongoing nature of the threats this rate is also suspected to continue in the future.

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	major	resident
Altitude	0 - 1410 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Indirect ecosystem effects, Ecosystem degradation
Agriculture & aquaculture	Livestock farming & ranching - Agro-industry grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Indirect ecosystem effects, Ecosystem degradation
Climate change & severe weather	Droughts	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Indirect ecosystem effects, Ecosystem degradation
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Future		Whole (>90%)		Unknown		Unknown
		Stresses Indirect ecosystem effects, Ecosystem degradation
Climate change & severe weather	Temperature extremes	Timing		Scope		Severity		Impact
		Future		Whole (>90%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Apis mellifera	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Unknown		Unknown
		Stresses Competition
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Capra hircus	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Negligible declines		Unknown
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Negligible declines		Unknown
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Oryctolagus cuniculus	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Negligible declines		Unknown
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Problematic native species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Negligible declines		Unknown
		Stresses Competition
Invasive and other problematic species, genes & diseases	Problematic native species/diseases - Unspecified species	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Unknown		Unknown
		Stresses Species mortality
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Rapid Declines		Medium Impact: 7
		Stresses Ecosystem degradation, Species mortality
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Negligible declines		Unknown
		Stresses Indirect ecosystem effects, Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: Glossy Black-cockatoo Calyptorhynchus lathami. Downloaded from https://datazone.birdlife.org/species/factsheet/glossy-black-cockatoo-calyptorhynchus-lathami on 23/11/2024.
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 23/11/2024.