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 | not a migrant | Forest dependency | does not normally occur in forest |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 10,100,000 km2 | |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 66700-667000 mature individuals | poor | estimated | 2023 |
| Population trend | stable | - | suspected | - |
| Generation length | 5.26 years | - | - | - |
Population justification: The global population size is estimated at 100,001-1,001,000 individuals (Wetlands International 2023), which equates to 66,700-667,000 mature individuals. The overall population trend is considered to be fluctuating over three generations (15.78 years) (Wetlands International 2023).
Trend justification: .
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Australia | extant | native | yes | |||
| Indonesia | extant | vagrant | yes | |||
| New Caledonia (to France) | extant | vagrant | yes | |||
| New Zealand | extinct | vagrant | yes | |||
| Papua New Guinea | extant | vagrant | yes | |||
| Solomon Islands | extant | vagrant | yes | |||
| Timor-Leste | extant | vagrant | yes | |||
| Vanuatu | extant | vagrant | yes |
| Country/Territory | IBA Name |
|---|---|
| Australia | Arcoona Lakes |
| Australia | Fortescue Marshes |
| Australia | Lake Argyle |
| Australia | Lake Gregory/Paraku |
| Australia | Lake Sylvester System |
| Australia | Mandora Marsh and Anna Plains |
| Australia | Paroo Floodplain and Currawinya |
| Australia | Strzelecki Desert Lakes |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Marine Coastal/Supratidal | Coastal Brackish/Saline Lagoons/Marine Lakes | suitable | resident |
| Marine Coastal/Supratidal | Coastal Freshwater Lakes | suitable | resident |
| Marine Neritic | Macroalgal/Kelp | suitable | 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 |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | major | resident |
| Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | major | resident |
| Altitude | 0 - 1150 m | Occasional altitudinal limits |
| Purpose | Scale |
|---|---|
| Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Hardhead Aythya australis. Downloaded from
https://datazone.birdlife.org/species/factsheet/hardhead-aythya-australis on 18/12/2024.
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 18/12/2024.