Taxonomic source(s)
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
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 | full migrant | Forest dependency | does not normally occur in forest |
Land-mass type | Average mass | 687 g |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 364,000 km2 | medium |
Extent of Occurrence (non-breeding) | 7,460,000 km2 | medium |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | unknown | poor | estimated | 1984 |
Population trend | unknown | - | - | - |
Generation length | 17.4 years | - | - | - |
Population justification: Croxall et al. (1984) estimate the population at 35,000 individuals.
Trend justification: The population trend is difficult to determine because of uncertainty over the extent of threats to the species (del Hoyo et al. 1996).
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Chile | extant | native | ||||
Colombia | extant | native | ||||
Costa Rica | extant | native | yes | |||
Ecuador | extant | native | ||||
Panama | extant | vagrant | ||||
Peru | extant | native |
Country/Territory | IBA Name |
---|---|
Ecuador | Áreas costeras de Fernandina y del occidente de Isabela |
Ecuador | Isla Floreana |
Ecuador | Isla San Cristóbal |
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 | non-breeding |
Marine Neritic | Macroalgal/Kelp | major | breeding |
Marine Neritic | Pelagic | suitable | breeding |
Marine Neritic | Seagrass (Submerged) | major | non-breeding |
Marine Neritic | Seagrass (Submerged) | major | breeding |
Marine Neritic | Subtidal Loose Rock/pebble/gravel | major | non-breeding |
Marine Neritic | Subtidal Loose Rock/pebble/gravel | major | breeding |
Marine Neritic | Subtidal Rock and Rocky Reefs | major | non-breeding |
Marine Neritic | Subtidal Rock and Rocky Reefs | major | breeding |
Marine Neritic | Subtidal Sandy | major | non-breeding |
Marine Neritic | Subtidal Sandy | major | breeding |
Marine Neritic | Subtidal Sandy-Mud | major | non-breeding |
Marine Neritic | Subtidal Sandy-Mud | major | breeding |
Altitude | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Climate change & severe weather | Temperature extremes | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Causing/Could cause fluctuations | Low Impact: 5 | ||||||
|
Recommended citation
BirdLife International (2024) Species factsheet: Swallow-tailed Gull Creagrus furcatus. Downloaded from
https://datazone.birdlife.org/species/factsheet/swallow-tailed-gull-creagrus-furcatus on 23/12/2024.
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 23/12/2024.