Data Zone
Taxonomic note
Ixobrychus minutus and I. dubius (del Hoyo and Collar 2014) were previously lumped as I. minutus 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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2016 | Least Concern | |
| 2014 | Least Concern | |
| 2012 | Not Recognised | |
| 2010 | Not Recognised | |
| 2009 | Not Recognised | |
| 2008 | Not Recognised | |
| 2004 | Not Recognised | |
| 2000 | Not Recognised | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | full migrant | Forest dependency | Low |
| Land mass type | Average mass | 118 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 9,210,000 | medium |
| Extent of Occurrence non-breeding (km2) | 11,500,000 | medium |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 0 | |||
| 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) | 4.1 | - | - | - |
Population justification: The global population size has not been estimated owing to recent taxonomic splits.
Trend justification: The overall population trend is decreasing, although some populations have unknown trends (Wetlands International 2006).
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Australia | N | Extant | Yes | |||
| Indonesia | N | Extant | Yes | |||
| New Zealand | V | Extant | ||||
| Papua New Guinea | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Aquatic & Marine | Artificial/Aquatic - Seasonally Flooded Agricultural Land | suitable | breeding |
| Artificial/Aquatic & Marine | Artificial/Aquatic - Seasonally Flooded Agricultural Land | suitable | non-breeding |
| Artificial/Aquatic & Marine | Artificial/Aquatic - Water Storage Areas (over 8ha) | suitable | breeding |
| Artificial/Aquatic & Marine | Artificial/Aquatic - Water Storage Areas (over 8ha) | suitable | non-breeding |
| Artificial/Terrestrial | Arable Land | suitable | non-breeding |
| Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | suitable | non-breeding |
| Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | suitable | breeding |
| Grassland | Subtropical/Tropical Seasonally Wet/Flooded | suitable | breeding |
| Grassland | Subtropical/Tropical Seasonally Wet/Flooded | suitable | non-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 |
| Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | suitable | breeding |
| Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | suitable | non-breeding |
| Wetlands (inland) | Permanent Inland Deltas | suitable | non-breeding |
| Wetlands (inland) | Permanent Inland Deltas | suitable | breeding |
| Altitude | Occasional altitudinal limits |
| Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
|---|---|---|---|---|---|---|
| Pets/display animals, horticulture | - | - | - | International | Non-trivial | Recent |
| Sport hunting/specimen collecting | - | - | - | Non-trivial | Recent |
Recommended citation
BirdLife International (2023) Species factsheet: Ixobrychus dubius. Downloaded from
http://www.birdlife.org on 25/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 25/03/2023.
