Data Zone
Taxonomic note
Catharacta antarctica (del Hoyo and Collar 2014) was previously placed in the genus Stercorarius, following Chu et al. (2009), and split as S. antarcticus and S. lonnbergi, following Sibley and Monroe (1990, 1993).
Taxonomic source(s)
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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2018 | Least Concern | |
| 2016 | Least Concern | |
| 2014 | Least Concern |
| Migratory status | full migrant | Forest dependency | Does not normally occur in forest |
| Land mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 135,000,000 | |
| Extent of Occurrence non-breeding (km2) | 86,100,000 | |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 26000-28000 | poor | estimated | 1996 |
| 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) | 17.1 | - | - | - |
Population justification: The total population has been estimated to number c.13,000-14,000 pairs (del Hoyo et al. 1996), assumed to equate to 26,000-28,000 mature individuals, or 39,000-42,000 individuals in total.
Trend justification: The largest known colony of the nominate race, C. antarctica antarctica, has undergone a 47% decline in the last 5 years, as such the species is suspected to be in decline, but the overall magnitude of decline is uncertain.
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Angola | U | Extant | ||||
| Antarctica | N | Extant | Yes | Yes | ||
| Argentina | N | Extant | ||||
| Australia | N | Extant | Yes | Yes | ||
| Bouvet Island (to Norway) | N | Extant | Yes | |||
| Brazil | U | Extant | ||||
| Chile | U | Extant | ||||
| Falkland Islands (Malvinas) | N | Extant | ||||
| French Southern Territories | N | Extant | Yes | |||
| Heard Island and McDonald Islands (to Australia) | N | Extant | Yes | |||
| India | V | Extant | ||||
| Iran, Islamic Republic of | V | Extant | ||||
| Maldives | N | Extant | ||||
| New Zealand | N | Extant | Yes | Yes | ||
| Norfolk Island (to Australia) | N | Extant | ||||
| Oman | V | Extant | Yes | |||
| Seychelles | N | Extant | ||||
| South Africa | N | Extant | Yes | |||
| South Georgia & the South Sandwich Islands | N | Extant | Yes | Yes | ||
| Sri Lanka | N | Extant | ||||
| St Helena (to UK) | U | Extant | Yes | |||
| Uruguay | N | Extant | Yes |
| 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 | suitable | breeding |
| Marine Intertidal | Shingle and/or Pebble Shoreline and/or Beaches | suitable | breeding |
| Marine Intertidal | Tidepools | suitable | breeding |
| Marine Neritic | Macroalgal/Kelp | suitable | non-breeding |
| Marine Neritic | Macroalgal/Kelp | suitable | breeding |
| Marine Neritic | Pelagic | major | non-breeding |
| Marine Neritic | Pelagic | major | breeding |
| Marine Neritic | Seagrass (Submerged) | suitable | non-breeding |
| Marine Neritic | Seagrass (Submerged) | suitable | breeding |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | suitable | non-breeding |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | suitable | breeding |
| Marine Neritic | Subtidal Rock and Rocky Reefs | suitable | breeding |
| Marine Neritic | Subtidal Rock and Rocky Reefs | suitable | non-breeding |
| Marine Neritic | Subtidal Sandy | suitable | non-breeding |
| Marine Neritic | Subtidal Sandy | suitable | breeding |
| Marine Neritic | Subtidal Sandy-Mud | suitable | non-breeding |
| Marine Neritic | Subtidal Sandy-Mud | suitable | breeding |
| Marine Oceanic | Epipelagic (0-200m) | suitable | non-breeding |
| Marine Oceanic | Mesopelagic (200-1000m) | suitable | non-breeding |
| Altitude | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Invasive and other problematic species, genes & diseases | Problematic native species/diseases - Phalcoboenus australis | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Recommended citation
BirdLife International (2023) Species factsheet: Catharacta antarctica. Downloaded from
http://www.birdlife.org on 30/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 30/03/2023.
