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

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
-	-	-

Red List history

Year	Category	Criteria
2018	Near Threatened	B2b(iv); D2
2016	Near Threatened	A2e+3e+4e; B2ab(iv); D2
2013	Near Threatened	A2e+3e+4e; B2ab(iv); D2
2012	Near Threatened	A2e+3e+4e;B2ab(iv);D2
2010	Near Threatened	A2e; A3e; A4e; B2a+b(iv); D2
2008	Near Threatened	B2a+b(iv); D2
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Migratory status	full migrant	Forest dependency	does not normally occur in forest
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	175,000,000 km2	medium
Area of Occupancy (breeding/resident)	912 km2
Number of locations	11-20	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	medium	estimated	2004
Population trend	decreasing	poor	suspected	1965-2010
Generation length	15.6 years	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: Brooke (2004) estimated that the population was likely greater than 1,500,000 individuals.

Trend justification: There are no data, but the species is thought to be declining due to the depredations of introduced predators on the breeding grounds.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
American Samoa	extant	uncertain
Antarctica	extant	native			yes
Australia	extant	native			yes
Canada	extant	native		yes	yes
Chile	extant	uncertain
Cook Islands	extant	uncertain
Ecuador	extant	vagrant
Fiji	extant	native			yes
French Polynesia	extant	uncertain
Japan	extant	vagrant
Kiribati	extant	uncertain
Marshall Islands	extant	native			yes
Mexico	extant	uncertain
Micronesia, Federated States of	extant	uncertain
Nauru	extant	uncertain
New Caledonia (to France)	extant	uncertain
New Zealand	extant	native		yes
Niue (to New Zealand)	extant	uncertain
Norfolk Island (to Australia)	extant	uncertain
Pitcairn Islands (to UK)	extant	uncertain
Russia	extant	vagrant
Russia (Asian)	extant	vagrant
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	uncertain
USA	extant	native		yes	yes
Vanuatu	extant	uncertain
Wallis and Futuna Islands (to France)	extant	uncertain

Country/Territory	IBA Name
New Zealand	Rakiura (offshore)
New Zealand	Southern South Island (offshore)
New Zealand	Southern Titi Muttonbird Islands
New Zealand	Whenua Hou Codfish Island

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Grassland	Subantarctic	major	breeding
Marine Coastal/Supratidal	Sea Cliffs and Rocky Offshore Islands	major	breeding
Marine Neritic	Macroalgal/Kelp	suitable	non-breeding
Marine Neritic	Macroalgal/Kelp	suitable	breeding
Marine Neritic	Pelagic	major	non-breeding
Marine Neritic	Pelagic	major	breeding
Marine Neritic	Seagrass (Submerged)	suitable	non-breeding
Marine Neritic	Seagrass (Submerged)	suitable	breeding
Marine Neritic	Subtidal Loose Rock/pebble/gravel	suitable	non-breeding
Marine Neritic	Subtidal Loose Rock/pebble/gravel	suitable	breeding
Marine Neritic	Subtidal Rock and Rocky Reefs	suitable	non-breeding
Marine Neritic	Subtidal Rock and Rocky Reefs	suitable	breeding
Marine Neritic	Subtidal Sandy	suitable	non-breeding
Marine Neritic	Subtidal Sandy	suitable	breeding
Marine Neritic	Subtidal Sandy-Mud	suitable	non-breeding
Marine Neritic	Subtidal Sandy-Mud	suitable	breeding
Marine Oceanic	Abyssopelagic (4000-6000m)	suitable	non-breeding
Marine Oceanic	Bathypelagic (1000-4000m)	suitable	non-breeding
Marine Oceanic	Epipelagic (0-200m)	major	non-breeding
Marine Oceanic	Epipelagic (0-200m)	major	breeding
Marine Oceanic	Mesopelagic (200-1000m)	major	non-breeding
Marine Oceanic	Mesopelagic (200-1000m)	major	breeding
Altitude	0 - 350 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Hunting & trapping terrestrial animals - Unintentional effects (species is not the target)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Reduced reproductive success
Climate change & severe weather	Temperature extremes	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Causing/Could cause fluctuations		Medium Impact: 6
		Stresses Indirect ecosystem effects, Reduced reproductive success, 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 Reduced reproductive success, Species mortality
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

Purpose	Scale
Food - human	subsistence, national
Food - human	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Mottled Petrel Pterodroma inexpectata. Downloaded from https://datazone.birdlife.org/species/factsheet/mottled-petrel-pterodroma-inexpectata 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.