VU
Chatham Parakeet Cyanoramphus forbesi



Taxonomy

Taxonomic source(s)
Boon, W. M.; Kearvell, J. C.; Daugherty, C. H.; Chambers, G. K. 2000. Molecular systematics of New Zealand Cyanoramphus Parakeets: conservation of Orange-fronted and Forbes' Parakeets. Bird Conservation International 10: 211-239.
Boon, W. M.; Kearvell, J. C.; Daugherty, C. H.; Chambers, G. K. 2000. Molecular systematics of New Zealand Cyanoramphus Parakeets: conservation of Orange-fronted and Forbes' Parakeets. Bird Conservation International 10: 211-239.
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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - D1+2

Red List history
Year Category Criteria
2016 Vulnerable D1+2
2012 Endangered D
2008 Endangered D1
2004 Endangered
2000 Endangered
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 3 medium
Extent of Occurrence non-breeding (km2) 310 medium
Extent of Occurrence breeding/resident (km2) 2 good
Number of locations 1 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 250-999 poor estimated 2007
Population trend Stable 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) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 1 - - -
Largest subpopulations 100 - - -
Generation length (yrs) 4.6 - - -

Population justification: The population of forbesi-like phenotypes has increased dramatically on Mangere Island with best estimates placing the population at 800-1,000 individuals. A survey in 2011 assessed the phenotypes of concern to be at 10%, the trigger level for management action (D. Houston in litt. 2012). The populations has now likely exceeded 250 mature individuals for over 5 years and so it is now placed in the range of 250-999 mature individuals.

Trend justification: The population has shown minor fluctuations in recent years, as the species recolonised Mangere Island by the 1970s and has benefited from habitat restoration, while it has also suffered from hybridisation. Overall, the population is estimated to have been stable over the last ten years, and is probably increasing (T. Greene in litt. 2012).


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

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

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Temperate major resident
Shrubland Temperate major resident
Altitude 0 - 287 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Livestock farming & ranching Timing Scope Severity Impact
Past, Unlikely to Return Majority (50-90%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation
Invasive and other problematic species, genes & diseases Problematic native species/diseases Timing Scope Severity Impact
Ongoing Majority (50-90%) No decline
Stresses
Hybridisation
Natural system modifications Fire & fire suppression Timing Scope Severity Impact
Past, Unlikely to Return Majority (50-90%) Rapid Declines
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2017) Species factsheet: Cyanoramphus forbesi. Downloaded from http://www.birdlife.org on 14/12/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 14/12/2017.