Buller's Shearwater Ardenna bulleri


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: #
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
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
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 135,000,000 medium
Extent of Occurrence breeding/resident (km2) 2 medium
Number of locations 7 -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals medium estimated 1990
Population trend Stable poor 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 - - -
Percentage in largest subpopulation 100 - - -
Generation length (yrs) 18.3 - - -

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 distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
American Samoa N Extant Yes
Australia N Extant Yes
Canada N Extant Yes
Chile N Extant Yes
Cook Islands N Extant Yes
Costa Rica U Extant
Ecuador U Extant
Fiji V Extant Yes
French Polynesia N Extant Yes
French Southern Territories U Extant
Japan V Extant
Kiribati U Extant
Marshall Islands N Extant Yes
Mexico N Extant Yes
Micronesia, Federated States of U Extant
Nauru U Extant
New Caledonia (to France) N Extant Yes
New Zealand N Extant Yes
Niue (to New Zealand) N Extant Yes
Norfolk Island (to Australia) N Extant Yes
Peru N Extant Yes
Russia N Extant Yes
Russia (Asian) N Extant Yes
Samoa U Extant
Solomon Islands U Extant
Tokelau (to New Zealand) U Extant
Tonga U Extant
Tuvalu U Extant
United States Minor Outlying Islands (to USA) N Extant Yes
USA N Extant Yes
Vanuatu U Extant
Wallis and Futuna Islands (to France) N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Peru Reserva Nacional de Paracas
New Zealand Poor Knights Islands
New Zealand Bay of Plenty Islands
New Zealand Manawatawhi Three Kings Islands
New Zealand North Eastern North Island (offshore)
New Zealand Kermadec (offshore)
Fiji East Kadavu Passage
New Zealand Poor Knights Islands
USA La Perouse Bank
New Zealand Aparima River
New Zealand Cook Strait
New Zealand East Coast South Island (offshore)
New Zealand Kaikoura (offshore)
New Zealand Canterbury (offshore)

Habitats & altitude
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  

Threats & impact
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
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
Species mortality
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
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
Ecosystem degradation

Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Ardenna bulleri. Downloaded from on 10/08/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from on 10/08/2022.