LC
Pacific Gull Larus pacificus



Taxonomy

Taxonomic source(s)
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
- - -

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/Near Threatened
1988 Near Threatened
Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 4,430,000
Extent of Occurrence non-breeding (km2) 392,000
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals poor estimated 1999
Population trend Stable 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 - - -
Largest subpopulations - - -
Generation length (yrs) 11.5 - - -

Population justification: Delany and Scott (2006) estimate the population to be c.11,000 individuals.

Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Australia N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Australia Babel Island Group
Australia Houtman Abrolhos
Australia Cheetham and Altona
Australia Corner Inlet
Australia Western Port
Australia Phillip Island
Australia Wilsons Promontory Islands
Australia Kangaroo Island
Australia Sir Joseph Banks Islands
Australia Hunter Island Group
Australia King Island
Australia Ninth and Little Waterhouse Islands
Australia Chalky, Big Green and Badger Island Groups
Australia Franklin Sound Islands
Australia Robbins Passage and Boullanger Bay
Australia St Helens (Tasmania)
Australia Investigator Islands

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Marine Coastal/Supratidal Sea Cliffs and Rocky Offshore Islands major breeding
Marine Intertidal Rocky Shoreline suitable resident
Marine Intertidal Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc suitable resident
Marine Intertidal Shingle and/or Pebble Shoreline and/or Beaches suitable resident
Marine Intertidal Tidepools suitable resident
Marine Neritic Macroalgal/Kelp suitable resident
Marine Neritic Pelagic suitable 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
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Indirect ecosystem effects, Ecosystem conversion
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Larus dominicanus Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Competition

Recommended citation
BirdLife International (2020) Species factsheet: Larus pacificus. Downloaded from http://www.birdlife.org on 11/07/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 11/07/2020.