VU
Antipodes Parakeet Cyanoramphus unicolor



Taxonomy

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.

IUCN Red List criteria met and history
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
Species attributes

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

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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
New Zealand Antipodes Islands

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

Threats & impact
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

Recommended citation
BirdLife International (2024) Species factsheet: Cyanoramphus unicolor. Downloaded from https://datazone.birdlife.org/species/factsheet/antipodes-parakeet-cyanoramphus-unicolor on 29/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 29/02/2024.