LC
Antarctic Tern Sterna vittata



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.
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
2019 Least Concern
2018 Least Concern
2016 Least Concern
2013 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 full migrant Forest dependency Does not normally occur in forest
Land mass type Average mass 139 g
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 34,400,000
Extent of Occurrence non-breeding (km2) 30,700,000
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2009
Population trend Unknown -
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 - - -

Population justification:


Trend justification: The population of S. v. sanctipauli is decreasing, but trends for the remainder of populations, and therefore the overall trend, is unknown (Delany and Scott 2006).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Antarctica N Extant Yes
Argentina N Extant
Australia N Extant
Bouvet Island (to Norway) N Extant Yes
Brazil N Extant
Chile N Extant
Falkland Islands (Malvinas) N Extant
French Southern Territories N Extant Yes
Heard Island and McDonald Islands (to Australia) N Extant
New Zealand N Extant
South Africa N Extant Yes
South Georgia & the South Sandwich Islands N Extant Yes
St Helena (to UK) N Extant Yes
Uruguay 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
French Southern Territories Île Saint Paul
South Africa Algoa Bay Islands: Addo Elephant National Park
South Africa Prince Edward Islands Special Nature Reserve
South Georgia & the South Sandwich Islands South Georgia - mainland, islands, islets and stacks
New Zealand Southern Titi Muttonbird Islands
New Zealand Campbell Islands
New Zealand Snares (eastern islands)
New Zealand Bounty Islands
New Zealand Enderby Group
New Zealand Antipodes Islands
Antarctica Byers Peninsula, Livingston Island
South Georgia & the South Sandwich Islands South Georgia - Marine
St Helena (to UK) Tristan da Cunha - Marine
St Helena (to UK) Gough Island - Marine
South Africa Prince Edward Islands Special Nature Reserve - Marine
New Zealand Antipodes Islands
New Zealand Disappointment Island
South Georgia & the South Sandwich Islands South Georgia 1 - Marine

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 major breeding
Marine Intertidal Shingle and/or Pebble Shoreline and/or Beaches suitable breeding
Marine Intertidal Tidepools major breeding
Marine Neritic Macroalgal/Kelp major breeding
Marine Neritic Macroalgal/Kelp major non-breeding
Marine Neritic Pelagic marginal resident
Marine Neritic Seagrass (Submerged) major breeding
Marine Neritic Seagrass (Submerged) major non-breeding
Marine Neritic Subtidal Loose Rock/pebble/gravel major breeding
Marine Neritic Subtidal Loose Rock/pebble/gravel major non-breeding
Marine Neritic Subtidal Rock and Rocky Reefs major breeding
Marine Neritic Subtidal Rock and Rocky Reefs major non-breeding
Marine Neritic Subtidal Sandy major breeding
Marine Neritic Subtidal Sandy major non-breeding
Marine Neritic Subtidal Sandy-Mud major breeding
Marine Neritic Subtidal Sandy-Mud major non-breeding
Rocky areas (eg. inland cliffs, mountain peaks) suitable breeding
Altitude 0 - 100 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Felis catus Timing Scope Severity Impact
Past, Unlikely to Return Minority (<50%) Slow, Significant Declines Past Impact
Stresses
Reduced reproductive success

Recommended citation
BirdLife International (2020) Species factsheet: Sterna vittata. 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.