• 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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	A4bcde

Red List history

Year	Category	Criteria
2018	Vulnerable	A4bcde
2016	Vulnerable	A4bcde
2015	Vulnerable	A4bcde
2012	Vulnerable	A4bcde
2010	Vulnerable	A4b,c,d,e
2008	Vulnerable	A4b,c,d,e
2005	Vulnerable
2004	Vulnerable
2000	Vulnerable
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	173,000,000 km2	medium
Area of Occupancy (breeding/resident)	3,300 km2	medium
Number of locations	11-100	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	3000000 mature individuals	medium	estimated	2012
Population trend	decreasing	medium	inferred	1980-2054
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	30-49%	-	-	-
Generation length	24.7 years	-	-	-
Number of subpopulations	2-100	-	-	-

Population justification: A global population of 1,200,000 breeding pairs, down from 1,430,000 pairs in the 1980s, is estimated based on figures from 1985-2011. This equates to an estimated global population of c.3 million mature individuals, based on the estimated number of breeding pairs extrapolated according to a ratio from Brooke (2004).

Trend justification: Globally, data on long-term trends are still lacking for most colonies. A decline is inferred from a drop in burrow occupancy of 28% over 20 years on Bird Island, South Georgia (Berrow et al. 2000a), and declines of 86% during 1981-1993 at sea in Prydz Bay, Antarctica (Woehler 1996). Population monitoring on Marion Island between 1996-1997 and 1999-2000 recorded an annual decrease of 14.5% in the population. Data from the Crozet archipelago indicate a decline of 37% in breeding pairs between 1983 and 2004, based on population models and field estimates from two surveys (Barbraud et al. in litt. 2008). At-sea surveys in the southern Indian Ocean suggest a 35% decline during 1981-2007 (Péron et al. 2010a), and data from fisheries and a population model suggest that the population on the Kerguelen Islands may be in decline (Barbraud et al. 2009). No population trend estimates are available from the Auckland, Campbell, Antipodes or Prince Edward Islands, representing approximately 17% of the global population.
Even when colonies on Auckland, Campbell, Antipodes, Prince Edward and Kerguelen are assumed to be stable, based on an ongoing decline of 1.6% per year on South Georgia (ACAP 2009) and declines in the smaller population on Crozet, the overall global population is projected to decline by 52% over three generations from 1980 (C. Small and W. Misiak in litt. 2013). Martin et al. (2009) estimate a greater rate of decline for South Georgia (-1.9% per annum). If the population on Kerguelen was suspected to be declining, the rate of overall population decline could be higher. An updated assessment of the population on South Georgia is needed in order to fully assess the overall trend (ACAP Secretariat in litt. 2013).

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Antarctica	extant	native			yes
Argentina	extant	native			yes
Australia	extant	native		yes
Bouvet Island (to Norway)	extant	uncertain
Brazil	extant	native			yes
Chile	extant	native			yes
Ecuador	extant	native			yes
Falkland Islands (Malvinas)	extant	native	yes
French Southern Territories	extant	native		yes
Heard Island and McDonald Islands (to Australia)	extant	native			yes
High Seas	extant	native			yes
Madagascar	extant	native			yes
Mozambique	extant	native			yes
Namibia	extant	native			yes
New Zealand	extant	native		yes
Peru	extant	native			yes
South Africa	extant	native		yes
South Georgia & the South Sandwich Islands	extant	native		yes
St Helena (to UK)	extant	native			yes
Uruguay	extant	native			yes

Country/Territory	IBA Name
Antarctica	Indian Ocean, Antarctic and Southern 38 - Marine
Antarctica	Indian Ocean, Antarctic and Southern 45 - Marine
Antarctica	Indian Ocean, Antarctic and Southern 46 - Marine
Falkland Islands (Malvinas)	Kidney Island Group
Falkland Islands (Malvinas)	New Island Group
French Southern Territories	Île de l'Est
New Zealand	Antipodes (offshore)
New Zealand	Antipodes Islands
New Zealand	Auckland Islands 1 (offshore)
New Zealand	Auckland Islands 2 (near-shore)
New Zealand	Disappointment Island
New Zealand	Enderby Group
New Zealand	Kaikoura (offshore)
Peru	Reserva Nacional de Paracas
South Africa	Prince Edward Islands Special Nature Reserve
South Georgia & the South Sandwich Islands	South Georgia - mainland, islands, islets and stacks
South Georgia & the South Sandwich Islands	South Georgia Inner Marine
South Georgia & the South Sandwich Islands	South Georgia Outer Marine

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Grassland	Subantarctic	major	breeding
Marine Neritic	Pelagic	suitable	non-breeding
Marine Neritic	Pelagic	suitable	breeding
Marine Oceanic	Epipelagic (0-200m)	major	non-breeding
Marine Oceanic	Epipelagic (0-200m)	major	breeding
Shrubland	Subantarctic	marginal	breeding
Altitude	0 - 420 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 Species mortality
Biological resource use	Fishing & harvesting aquatic resources - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Species mortality
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Minority (<50%)		Slow, Significant Declines		Past Impact
		Stresses Species mortality
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 - Rangifer tarandus	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Minority (<50%)		Slow, Significant Declines		Past Impact
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Rattus norvegicus	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Minority (<50%)		Slow, Significant Declines		Past Impact
		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

Purpose	Scale
Food - human	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: White-chinned Petrel Procellaria aequinoctialis. Downloaded from https://datazone.birdlife.org/species/factsheet/white-chinned-petrel-procellaria-aequinoctialis on 22/12/2024.
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 22/12/2024.