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closeIUCN Red List history
| Year | Category |
|---|---|
| 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) | 109,000 | medium |
| Number of locations | - | |
| Fragmentation | - |
Population & trend
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 6000-15000 | poor | Estimated | 2009 |
| Population trend | Stable | - | ||
| Number of subpopulations | - | - | - | |
| Largest subpopulation | - | - | - | |
| Generation length (yrs) | 17.1 | - | - | - |
| Population justification: The population is placed in the band 10,000-19,999 individuals, equating to 6,667-13,333 mature individuals, rounded here to 6,000-15,000 mature 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 | Extinct | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|
| Antarctica | Native | No | Yes | ||
| Antigua and Barbuda | Native | No | |||
| Argentina | Native | No | |||
| Australia | Vagrant | No | Yes | ||
| Barbados | Native | No | |||
| Bermuda (to UK) | Vagrant | No | Yes | ||
| Bouvet Island (to Norway) | Unknown | No | |||
| Brazil | Native | No | |||
| Canada | Native | No | |||
| Chile | Native | No | |||
| Comoros | Vagrant | No | Yes | ||
| Costa Rica | Native | No | Yes | ||
| Dominica | Native | No | |||
| Ecuador | Vagrant | No | Yes | ||
| Egypt | Vagrant | No | Yes | ||
| Falkland Islands (Malvinas) | Native | No | |||
| Fiji | Vagrant | No | Yes | ||
| French Guiana | Native | No | |||
| Greenland (to Denmark) | Vagrant | No | Yes | ||
| Guadeloupe (to France) | Native | No | |||
| Guatemala | Unknown | No | Yes | ||
| India | Vagrant | No | Yes | ||
| Indonesia | Vagrant | No | Yes | ||
| Israel | Vagrant | No | Yes | ||
| Japan | Native | No | |||
| Jordan | Vagrant | No | Yes | ||
| Kenya | Vagrant | No | Yes | ||
| Maldives | Native | No | |||
| Martinique (to France) | Native | No | |||
| Mauritius | Vagrant | No | Yes | ||
| Mexico | Native | No | |||
| Micronesia, Federated States of | Native | No | Yes | ||
| Montserrat (to UK) | Native | No | |||
| Mozambique | Native | No | |||
| Namibia | Native | No | |||
| New Zealand | Native | No | |||
| Oman | Vagrant | No | Yes | ||
| Palau | Unknown | No | |||
| Panama | Native | No | |||
| Peru | Native | No | |||
| Portugal | Vagrant | No | Yes | ||
| Seychelles | Native | No | |||
| Somalia | Vagrant | No | Yes | ||
| South Africa | Native | No | |||
| South Georgia & the South Sandwich Islands | Native | No | |||
| Sri Lanka | Vagrant | No | Yes | ||
| St Kitts and Nevis | Native | No | |||
| St Lucia | Native | No | |||
| St Pierre and Miquelon (to France) | Native | No | Yes | ||
| St Vincent and the Grenadines | Native | No | |||
| Suriname | Native | No | |||
| Trinidad and Tobago | Native | No | |||
| USA | Native | No | Yes | ||
| Virgin Islands (to UK) | Unknown | No | |||
| Virgin Islands (to USA) | Unknown | No | |||
| Yemen | Vagrant | No | Yes |
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory | IBA Name | IBA link |
|---|---|---|
| Antarctica | Avian Island |  |
| Antarctica | Cierva Point and offshore islands | |
| Antarctica | Half Moon Island | |
| Antarctica | Litchfield Island | |
| Antarctica | Potter Peninsula, King George Island | |
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 | Tidepools | 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) | suitable | non-breeding |
| Rocky areas (eg. inland cliffs, mountain peaks) | suitable | breeding | |
| Altitude | 0 - 0 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2013) Species factsheet: Stercorarius maccormicki. Downloaded from
http://www.birdlife.org on 24/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 24/05/2013.
This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.
| Key facts | |
|---|---|
| Current IUCN Red List category | Least Concern |
| Family | Stercorariidae (Skuas and jaegers) |
| Species name author | (Saunders, 1893) |
| Population size | 6000-15000 mature individuals |
| Population trend | Stable |
| Distribution size (breeding/resident) | 109,000 km2 |
| Country endemic? | No |
| Links to further information | |
| - Summary information on this species | |
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