Data Zone
Taxonomic note
Catharacta chilensis (del Hoyo and Collar 2014) was previously placed in the genus Stercorarius.
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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| 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 |
| Migratory status | not a migrant | Forest dependency | does not normally occur in forest |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 1,140,000 km2 | medium |
| Extent of Occurrence (non-breeding) | 7,430,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 2500-9999 mature individuals | poor | estimated | 1996 |
| Population trend | stable | - | suspected | - |
| Generation length | 17.2 years | - | - | - |
Population justification: Del Hoyo et al. (1996) estimate the population size at several thousand pairs. Therefore, the population size is tentatively placed here in the range 2,500-9,999 mature individuals, although this could be an underestimate.
Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Antarctica | extant | vagrant | yes | |||
| Argentina | extant | native | yes | |||
| Brazil | extant | vagrant | yes | |||
| Chile | extant | native | yes | |||
| Ecuador | extant | vagrant | yes | |||
| Falkland Islands (Malvinas) | extant | uncertain | yes | |||
| Peru | extant | native | yes | |||
| Uruguay | extant | vagrant | yes |
| Country/Territory | IBA Name |
|---|---|
| Chile | Isla Magdalena National Park |
| Chile | Isla Noir |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Grassland | Temperate | suitable | breeding |
| Marine Coastal/Supratidal | Sea Cliffs and Rocky Offshore Islands | major | breeding |
| Marine Intertidal | Rocky Shoreline | suitable | breeding |
| Marine Intertidal | Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc | suitable | breeding |
| Marine Intertidal | Shingle and/or Pebble Shoreline and/or Beaches | suitable | breeding |
| Marine Intertidal | Tidepools | suitable | breeding |
| Marine Neritic | Macroalgal/Kelp | major | resident |
| Marine Neritic | Pelagic | suitable | resident |
| Marine Neritic | Seagrass (Submerged) | major | resident |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | major | resident |
| Marine Neritic | Subtidal Rock and Rocky Reefs | major | resident |
| Marine Neritic | Subtidal Sandy | major | resident |
| Marine Neritic | Subtidal Sandy-Mud | major | resident |
| 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 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Biological resource use | Fishing & harvesting aquatic resources - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Unknown | Unknown | ||||||
|
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| Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
|||||||||
| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Future | Majority (50-90%) | Unknown | Unknown | ||||||
|
|||||||||
| Purpose | Scale |
|---|---|
| Food - human | subsistence, national |
Recommended citation
BirdLife International (2024) Species factsheet: Chilean Skua Catharacta chilensis. Downloaded from
https://datazone.birdlife.org/species/factsheet/chilean-skua-catharacta-chilensis on 22/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 22/12/2024.