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

Taxonomic note
Ardenna bulleri (del Hoyo and Collar 2014) was previously placed in the genus Puffinus.

Taxonomic source(s)
Brooke, M. de L. 2004. Albatrosses and Petrels Across the World. Oxford University Press, Oxford.
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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
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
2018	Vulnerable	D2
2016	Vulnerable	D2
2012	Vulnerable	D2
2010	Vulnerable	D2
2008	Vulnerable	D2
2006	Vulnerable
2004	Vulnerable
2000	Vulnerable
1994	Lower Risk/Near Threatened
1988	Lower Risk/Least Concern

Migratory status	full migrant	Forest dependency	medium
Land-mass type		Average mass	407 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	135,000,000 km2	medium
Area of Occupancy (breeding/resident)	2 km2	medium
Number of locations	7	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	medium	estimated	1990
Population trend	stable	poor	suspected	-
Generation length	18.3 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The total population is estimated at 2.5 million birds (Marchant and Higgins 1990), although this estimate is likely too high (G. Taylor in litt. 2012, Waugh et al. 2013).

Trend justification: Pigs were exterminated on Aorangi in 1936 and the population has increased since then, although it is now suspected to be stable or even decreasing (G. Taylor in litt. 2012, Waugh et al. 2013).

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
American Samoa	extant	native			yes
Australia	extant	native			yes
Canada	extant	native			yes
Chile	extant	native			yes
Cook Islands	extant	native			yes
Costa Rica	extant	uncertain
Ecuador	extant	uncertain
Fiji	extant	vagrant			yes
French Polynesia	extant	native			yes
French Southern Territories	extant	uncertain
Japan	extant	vagrant
Kiribati	extant	uncertain
Marshall Islands	extant	native			yes
Mexico	extant	native			yes
Micronesia, Federated States of	extant	uncertain
Nauru	extant	uncertain
New Caledonia (to France)	extant	native			yes
New Zealand	extant	native		yes
Niue (to New Zealand)	extant	native			yes
Norfolk Island (to Australia)	extant	native			yes
Peru	extant	native	yes
Russia	extant	native			yes
Russia (Asian)	extant	native			yes
Samoa	extant	uncertain
Solomon Islands	extant	uncertain
Tokelau (to New Zealand)	extant	uncertain
Tonga	extant	uncertain
Tuvalu	extant	uncertain
United States Minor Outlying Islands (to USA)	extant	native			yes
USA	extant	native			yes
Vanuatu	extant	uncertain
Wallis and Futuna Islands (to France)	extant	native			yes

Country/Territory	IBA Name
Chile	Valparaiso - pelagico
New Zealand	Kaikoura (offshore)
New Zealand	North Eastern North Island (offshore)
New Zealand	Poor Knights Islands
Peru	Reserva Nacional de Paracas
USA	La Perouse Bank

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	major	breeding
Forest	Subtropical/Tropical Moist Lowland	major	breeding
Forest	Temperate	major	breeding
Marine Coastal/Supratidal	Sea Cliffs and Rocky Offshore Islands	suitable	breeding
Marine Neritic	Pelagic	major	non-breeding
Marine Neritic	Pelagic	major	breeding
Marine Oceanic	Epipelagic (0-200m)	major	non-breeding
Marine Oceanic	Epipelagic (0-200m)	major	breeding
Altitude	0 - 200 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Fishing & harvesting aquatic resources - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Indirect ecosystem effects, Reduced reproductive success, Species mortality
Biological resource use	Fishing & harvesting aquatic resources - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Species mortality
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 - Sus domesticus	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Majority (50-90%)		No decline		Past Impact
		Stresses Ecosystem degradation

Purpose	Scale
Food - human	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Buller's Shearwater Ardenna bulleri. Downloaded from https://datazone.birdlife.org/species/factsheet/bullers-shearwater-ardenna-bulleri 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.