Data Zone
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.
Turbott, E.G. 1990. Checklist of the Birds of New Zealand. Ornithological Society of New Zealand, Wellington.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2024 | 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 | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 17,500,000 km2 | |
| Extent of Occurrence (non-breeding) | 22,400,000 km2 | |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | poor | estimated | 2009 |
| Population trend | stable | - | suspected | - |
| Generation length | 7.58 years | - | - | - |
Population justification: The population is estimated to number in the tens of thousands. The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
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 |
|---|---|---|---|---|---|---|
| Australia | extant | native | yes | |||
| Fiji | extant | native | yes | |||
| French Polynesia | extant | introduced | yes | |||
| Indonesia | extant | native | ||||
| New Caledonia (to France) | extant | native | yes | |||
| New Zealand | extant | native | yes | |||
| Papua New Guinea | extant | native | yes | |||
| Tonga | extant | native | yes | |||
| Vanuatu | extant | native | yes | |||
| Wallis and Futuna Islands (to France) | extant | native | yes |
| Country/Territory | IBA Name |
|---|
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Aquatic & Marine | Artificial/Aquatic - Excavations (open) | suitable | non-breeding |
| Artificial/Aquatic & Marine | Artificial/Aquatic - Excavations (open) | suitable | breeding |
| Artificial/Aquatic & Marine | Artificial/Aquatic - Irrigated Land (includes irrigation channels) | suitable | non-breeding |
| Artificial/Aquatic & Marine | Artificial/Aquatic - Irrigated Land (includes irrigation channels) | suitable | breeding |
| Artificial/Terrestrial | Arable Land | suitable | non-breeding |
| Artificial/Terrestrial | Arable Land | suitable | breeding |
| Grassland | Temperate | suitable | non-breeding |
| Grassland | Temperate | suitable | breeding |
| Marine Intertidal | Salt Marshes (Emergent Grasses) | suitable | non-breeding |
| Marine Intertidal | Salt Marshes (Emergent Grasses) | suitable | breeding |
| Shrubland | Temperate | suitable | non-breeding |
| Shrubland | Temperate | suitable | breeding |
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | non-breeding |
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | suitable | non-breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | suitable | breeding |
| Altitude | 0 - 3800 m | Occasional altitudinal limits |
| Purpose | Scale |
|---|---|
| Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Swamp Harrier Circus approximans. Downloaded from
https://datazone.birdlife.org/species/factsheet/swamp-harrier-circus-approximans on 04/12/2024.
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 04/12/2024.