EN
Barau's Petrel Pterodroma baraui



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.

IUCN Red list criteria met and history
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
Species attributes

Migratory status full migrant Forest dependency High
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 31,300,000 medium
Extent of Occurrence breeding/resident (km2) 16 medium
Number of locations 4 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 30000-40000 medium estimated 2016
Population trend Decreasing 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 - - -
Largest subpopulations 100 - - -
Generation length (yrs) 15.6 - - -

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 Recently, a combination of methods including annual census of fledglings attracted to lights from 1996 to 2016 (SEOR unpublished), wide scale radar survey, capture and recapture analysis at breeding colonies, study of burrow occupancy, habitat modelling (and population genetics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 distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Australia N Extant Yes
British Indian Ocean Territory N Extant Yes
Christmas Island (to Australia) N Extant Yes
Cocos (Keeling) Islands (to Australia) N Extant Yes
Indonesia V Extant
Madagascar N Extant Yes
Mauritius N Extant Yes
Mozambique V Extant
Réunion (to France) N Extant Yes
South Africa N Extant Yes
Sri Lanka V Extant

Important Bird and Biodiversity Areas (IBA)
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

Habitats & altitude
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  

Threats & impact
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

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food (human) Whole Adults and juveniles Wild Non-trivial Recent
Food - human - - Non-trivial Recent

Recommended citation
BirdLife International (2019) Species factsheet: Pterodroma baraui. Downloaded from http://www.birdlife.org on 22/09/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/09/2019.