LC
Broad-billed Prion Pachyptila vittata



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
- - -

Red List history
Year Category Criteria
2018 Least Concern
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 138,000,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2004
Population trend Decreasing 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 - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 11.7 - - -

Population justification: Brooke (2004) estimated the global population to exceed 15,000,000 individuals.

Trend justification: The population is suspected to be declining owing to predation from invasive species.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Angola U Extant
Antarctica V Extant Yes
Argentina N Extant Yes
Australia N Extant Yes
Falkland Islands (Malvinas) N Extant Yes
Madagascar V Extant Yes
Mozambique N Extant Yes
Namibia U Extant
New Zealand N Extant Yes
Peru N Extant Yes
South Africa N Extant Yes
South Georgia & the South Sandwich Islands N Extant Yes
St Helena (to UK) N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
St Helena (to UK) Tristan Island
St Helena (to UK) Inaccessible Island
St Helena (to UK) Nightingale Island group
St Helena (to UK) Gough Island
New Zealand Southern Titi Muttonbird Islands
New Zealand Snares (eastern islands)
New Zealand Main Chatham
New Zealand Mangere
New Zealand Rangiauria Pitt Island
New Zealand Rangatira South East Island
New Zealand Star Keys Motuhope
New Zealand The Sisters Rangitatahi
New Zealand Northern Titi Muttonbird Islands
New Zealand Whenua Hou Codfish Island
New Zealand Stewart Island / the rest
New Zealand Solander Islands
New Zealand Codfish Island/Whenua Hou
New Zealand Northern Muttonbird (Titi) Islands
New Zealand Rangitira/South East Island
New Zealand Rabbit Island
New Zealand Mangere Island & Little Mangere Island/Tapuaenuku
New Zealand Port Pegasus
New Zealand Ruapuke
New Zealand Tuku
New Zealand Western Chain
New Zealand Moeraki Katiki Point
New Zealand Chatham Islands (nearshore)
New Zealand Chatham (offshore)

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Subantarctic major breeding
Marine Coastal/Supratidal Sea Cliffs and Rocky Offshore Islands major breeding
Marine Intertidal Rocky Shoreline major breeding
Marine Neritic Macroalgal/Kelp suitable resident
Marine Neritic Pelagic major resident
Marine Neritic Seagrass (Submerged) suitable resident
Marine Neritic Subtidal Loose Rock/pebble/gravel suitable resident
Marine Neritic Subtidal Rock and Rocky Reefs suitable resident
Marine Neritic Subtidal Sandy suitable resident
Marine Neritic Subtidal Sandy-Mud suitable resident
Marine Oceanic Epipelagic (0-200m) major resident
Marine Oceanic Mesopelagic (200-1000m) major resident
Rocky areas (eg. inland cliffs, mountain peaks) suitable breeding
Altitude 0 - 300 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Storms & flooding Timing Scope Severity Impact
Past, Likely to Return Minority (<50%) Rapid Declines Past Impact
Stresses
Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Felis catus Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
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
Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Mus musculus Timing Scope Severity Impact
Ongoing Minority (<50%) Very Rapid Declines Medium Impact: 7
Stresses
Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Mustela erminea Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Unspecified species Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Reduced reproductive success

Recommended citation
BirdLife International (2022) Species factsheet: Pachyptila vittata. Downloaded from http://www.birdlife.org on 30/09/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 30/09/2022.