• 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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	B2ab(v)	B2ab(v); D2

Red List history

Year	Category	Criteria
2018	Endangered	B2ab(v)
2016	Endangered	B2ab(v)
2012	Endangered	B2ab(iii,v)
2010	Endangered	B2a+b(iii,v)
2008	Endangered	B2a+b(iii,v)
2007	Endangered
2006	Endangered
2004	Endangered
2000	Endangered
1996	Critically Endangered
1994	Critically Endangered
1988	Near Threatened

Migratory status	full migrant	Forest dependency	high
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	31,300,000 km2	medium
Area of Occupancy (breeding/resident)	16 km2	medium
Number of locations	4	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	30000-40000 mature individuals	medium	estimated	2016
Population trend	decreasing	poor	suspected	1965-2010
Generation length	15.6 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: Most breeding colonies of Barau's Petrel are completely out of reach and have never been assessed properly until recently. Thus, most previous population estimates and trends should be taken with caution. Recently, a combination of methods including annual census of fledglings attracted to lights from 1996 to 2016 (SEOR unpublished), wide scale radar survey, capture and recapture analysis at breeding colonies, study of burrow occupancy, habitat modelling (and population genetics (Danckwerts et al. 2016) have been conducted to assess the size of the population. Such an effort has provided a preliminary estimate of 15,000 to 20,000 breeding pairs, a larger number of mature individuals than previously reported. Nevertheless, previous estimates were based only on a partial knowledge of the species.

Trend justification: The species was suspected to be undergoing a long-term decline in line with increased juvenile mortality caused by disorientation resulting from light pollution. Both adults and chicks are also predated by introduced mammals (cats and rats) at breeding colonies.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Australia	extant	native			yes
British Indian Ocean Territory	extant	native			yes
Christmas Island (to Australia)	extant	native			yes
Cocos (Keeling) Islands (to Australia)	extant	native			yes
High Seas	extant	native			yes
Indonesia	extant	vagrant
Madagascar	extant	native			yes
Mauritius	extant	native		yes
Mozambique	extant	vagrant
Réunion (to France)	extant	native		yes
South Africa	extant	native			yes
Sri Lanka	extant	vagrant

Country/Territory	IBA Name
High Seas	Indian Ocean, Western 39 - Marine
High Seas	Indian Ocean, Western 40 - Marine
High Seas	Indian Ocean, Western 42 - Marine
High Seas	Indian Ocean, Western 43 - Marine
High Seas	Indian Ocean, Western 44 - Marine
High Seas	Indian Ocean, Western 45 - Marine
High Seas	Indian Ocean, Western 46 - Marine
High Seas	Indian Ocean, Western 47 - Marine
High Seas	Indian Ocean, Western 48 - Marine
High Seas	Indian Ocean, Western 49 - Marine
High Seas	Indian Ocean, Western 50 - Marine
Réunion (to France)	Grand Bénard - Tapcal
Réunion (to France)	Piton des Neiges - Gros Morne

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	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
Shrubland	Subtropical/Tropical High Altitude	major	breeding
Altitude	2200 - 3000 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Minority (<50%)		Rapid Declines		Past Impact
		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 - Canis familiaris	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Capra hircus	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Whole (>90%)		Rapid Declines		High Impact: 8
		Stresses Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Whole (>90%)		Slow, Significant Declines		Medium Impact: 7
		Stresses Reduced reproductive success
Pollution	Excess energy - Light pollution	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Species mortality

Purpose	Scale
Food - human	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Barau's Petrel Pterodroma baraui. Downloaded from https://datazone.birdlife.org/species/factsheet/baraus-petrel-pterodroma-baraui 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.