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

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.
Turbott, E.G. 1990. Checklist of the Birds of New Zealand. Ornithological Society of New Zealand, Wellington.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	D2

Red List history

Year	Category	Criteria
2022	Vulnerable	D2
2016	Vulnerable	D2
2013	Vulnerable	D2
2012	Vulnerable	D2
2008	Vulnerable	D2
2004	Vulnerable
2000	Vulnerable
1996	Vulnerable
1994	Vulnerable
1988	Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	84 km2	medium
Area of Occupancy (breeding/resident)	84 km2	good
Number of locations	5	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	2000-3000 mature individuals	medium	estimated	2021
Population trend	stable	poor	estimated	-
Generation length	4.13 years	-	-	-
Number of subpopulations	5	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The population was estimated to number 2,000-3,000 mature individuals in 1978 (Taylor 1985). The density of Antipodes Island parakeets was estimated using distance sampling in 2013 to be 1.02 (0.47-2.22) per ha, suggesting 2,142 individuals and therefore a similar population size to the 1978 estimate, although recent estimates following mouse eradication suggest that the species may now exceed this (Horn et al. 2019; T. Greene in litt. 2020). Currently the population trend is still believed to be stable (Robertson et al. 2021). For these reasons, the population size is still thought to be in the range of 2,000-3,000 mature individuals.

Trend justification: There are no new data on population trends, but there is no indication of a population decline and the population size is thought to be consistent with past estimates (Elliott et al. 2015). The population trend was believed to be stable throughout the last three generations (Robertson et al. 2013, 2017, 2021). Although some birds were affected by poisoning following mouse eradication in 2016, subsequent distance sampling showed that the species has persisted and increased in numbers since (Horn et al. 2019). Population density may increase further due to reduced competition with mice (Horn et al. 2019).

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

Country/Territory	IBA Name
New Zealand	Antipodes Islands

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Grassland	Subantarctic	major	resident
Altitude	0 - 300 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Future		Whole (>90%)		Unknown		Unknown
		Stresses Indirect ecosystem effects, Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Rapid Declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Mus musculus	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Majority (50-90%)		Negligible declines		Past Impact
		Stresses Competition
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Mustela erminea	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Rapid Declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Mustela furo	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Rapid Declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Mustela nivalis	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Rapid Declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Rapid Declines		Low Impact: 5
		Stresses Reduced reproductive success

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Recommended citation
BirdLife International (2024) Species factsheet: Antipodes Parakeet Cyanoramphus unicolor. Downloaded from https://datazone.birdlife.org/species/factsheet/antipodes-parakeet-cyanoramphus-unicolor 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.