• 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. 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.
Turbott, E. G. 1990. Checklist of the birds of New Zealand. Ornithological Society of New Zealand, Wellington.
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
-	-	C2a(ii)

Red List history

Year	Category	Criteria
2016	Vulnerable	C2a(ii)
2012	Vulnerable	C2a(ii)
2008	Vulnerable	C2a(ii)
2006	Vulnerable
2004	Vulnerable
2000	Vulnerable
1994	Lower Risk/Near Threatened
1988	Lower Risk/Least Concern

Migratory status	not a migrant	Forest dependency	Medium
Land mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	119,000	medium
Number of locations	11-100	-
Fragmentation		-

	Estimate	Data quality	Derivation	Year of estimate
No. of mature individuals	3300	poor	estimated	2000
Population trend	Decreasing	medium	suspected	-
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)	12	-	-	-

Population justification: The population has been estimated to number c.5,000 individuals (Peat 1994, Heather and Robertson 1997), on which basis the number of mature individuals is put at 3,300, although up-to-date survey data are required.

Trend justification: The population is a fraction of what it once was. One study detected an apparent decrease in numbers over 30 years at one site (Wilson and Brejaart 1992). It is now suspected to be declining overall, because of predation by, and competition with, various introduced mammals.

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

Country/Territory	IBA Name
New Zealand	Dusky Sound Wet Jacket Arm
New Zealand	Ka Whata Tu o Rakihouia/Kaikoura
New Zealand	Wairau River

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Pastureland	marginal	non-breeding
Artificial/Terrestrial	Urban Areas	suitable	non-breeding
Forest	Subtropical/Tropical Moist Lowland	major	breeding
Forest	Temperate	major	resident
Grassland	Subtropical/Tropical High Altitude	major	resident
Grassland	Temperate	major	resident
Shrubland	Subtropical/Tropical High Altitude	major	breeding
Altitude	0 - 2400 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Livestock farming & ranching	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Minority (<50%)		Unknown		Past Impact
		Stresses Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Biological resource use	Hunting & trapping terrestrial animals	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Species mortality
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Future		Unknown		Unknown		Unknown
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Competition
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Competition
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Competition
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Competition
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Competition, Reduced reproductive success
Pollution	Agricultural & forestry effluents	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation

Purpose	Primary form used	Life stage used	Source	Scale	Level	Timing
Pets	Whole	Adults and juveniles	Wild		Non-trivial	Recent
Pets	Whole	Adults and juveniles	Wild	International	Trivial	Recent

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Recommended citation
BirdLife International (2017) Species factsheet: Nestor notabilis. Downloaded from http://www.birdlife.org on 19/10/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/10/2017.