VU
Cook's Petrel Pterodroma cookii



Taxonomy

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: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.
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
- - A2e; D2

Red List history
Year Category Criteria
2018 Vulnerable A2e; D2
2016 Vulnerable A2e;D2
2012 Vulnerable A2e;D2
2010 Vulnerable A2e; D2
2009 Vulnerable D2
2008 Endangered
2007 Endangered
2006 Endangered
2004 Endangered
2000 Endangered
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status full migrant Forest dependency High
Land mass type Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 139,000,000 medium
Extent of Occurrence breeding/resident (km2) 320 medium
Number of locations 2 -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 670000 good estimated 2008
Population trend Increasing good 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 2 - - -
Percentage in largest subpopulation 95-99 - - -
Generation length (yrs) 15.6 - - -

Population justification: M. Rayner (in litt. 2012) estimates over 650,000 mature individuals on Little Barrier in 2007 and c.15,000 mature individuals on the Cod fish Islands in 2008, thus the total population estimate is rounded to c.670,000 mature individuals.

Trend justification: The population has suffered rapid declines in the past owing to the effects of introduced predators; however, thanks to conservation action and invasive species eradications it is now estimated to be increasing.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
American Samoa N Extant Yes
Australia V Extant
Canada V Extant Yes
Chile N Extant Yes
Cook Islands N Extant Yes
Ecuador U Extant
French Polynesia N Extant Yes
French Southern Territories U Extant
High Seas N Extant Yes
Kiribati V Extant
Mexico N Extant Yes
New Caledonia (to France) U Extant
New Zealand N Extant Yes
Niue (to New Zealand) N Extant Yes
Norfolk Island (to Australia) N Extant Yes
Peru N Extant Yes
Pitcairn Islands (to UK) N Extant Yes
Samoa 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 Yes
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 Te Hauturu-o-Toi Little Barrier Island
New Zealand Kermadec Islands (Meyer Island)
New Zealand Whenua Hou Codfish Island
New Zealand North Eastern North Island (offshore)
New Zealand West Coast North Island (offshore)
New Zealand East Coast North Island (offshore)
Peru Pacific, Southeast 11 - Marine
Peru Humedales de Chimbote / Isla Lobos de Afuera / Isla Lobos de Tierra - Marine
Peru Pacific, Southeast 26 - Marine
New Zealand Pacific, Southwest 29 - Marine
New Zealand Pacific, Southwest 30 - Marine
New Zealand Pacific, Southwest 31 - Marine
New Zealand Pacific, Southwest 32 - Marine
New Zealand Pacific, Southwest 33 - Marine
New Zealand Pacific, Southwest 37 - Marine
New Zealand Pacific, Southwest 38 - Marine
New Zealand Pacific, Southwest 39 - Marine
New Zealand Pacific, Southwest 46 - Marine
New Zealand Pacific, Southwest 47 - Marine
New Zealand Pacific, Southwest 48 - Marine
New Zealand Pacific, Southwest 61 - Marine
High Seas Pacific, Eastern Central 3 - Marine
New Zealand Little Barrier Island/Hauturu
New Zealand North Auckland Seabird Flyway
New Zealand Codfish Island/Whenua Hou
New Zealand Cape Kidnappers
New Zealand Hirakimata Kotuku Peninsula
New Zealand Rakiura (offshore)
New Zealand Fiordland - West Coast South Island (South) (offshore)

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Temperate major 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 - 700 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Felis catus Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Gallirallus australis Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Rattus exulans Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Reduced reproductive success
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Rattus rattus Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Reduced reproductive success

Recommended citation
BirdLife International (2022) Species factsheet: Pterodroma cookii. Downloaded from http://www.birdlife.org on 09/12/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 09/12/2022.