IUCN 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 |
full migrant |
Forest dependency |
Does not normally occur in forest |
| Land mass type |
|
Average mass |
1182 g
|
Distribution
| |
Estimate |
Data quality |
| Extent of Occurrence breeding/resident (km2) |
1,630,000 |
medium |
| Number of locations |
|
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
|
poor |
Estimated |
2009 |
| Population trend |
Increasing |
|
|
- |
| Number of subpopulations |
|
- |
- |
- |
| Largest subpopulation |
|
- |
- |
- |
| Generation length (yrs) |
10.9 |
- |
- |
- |
|
Trend justification: The overall trend is suspected to be increasing (Wetlands International 2006). |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Botswana |
Native |
No |
|
|
|
| Lesotho |
Native |
No |
|
|
|
| Namibia |
Native |
No |
|
|
|
| South Africa |
Native |
No |
|
|
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| South Africa |
Barberspan and Leeupan |
 |
| South Africa |
Botriviervlei and Kleinmond estuary |
|
| South Africa |
False Bay Park (proposed) |
|
| South Africa |
Kamfers Dam |
|
| South Africa |
Orange river mouth wetlands |
|
| South Africa |
Spitskop Dam |
|
| South Africa |
Verlorenvlei |
|
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Artificial/Aquatic & Marine |
Wastewater Treatment Areas |
suitable |
non-breeding |
| Artificial/Aquatic & Marine |
Water Storage Areas (over 8ha) |
suitable |
non-breeding |
| Artificial/Terrestrial |
Arable Land |
suitable |
non-breeding |
| Grassland |
Subtropical/Tropical Dry |
suitable |
non-breeding |
| Grassland |
Subtropical/Tropical Seasonally Wet/Flooded |
suitable |
non-breeding |
| Grassland |
Subtropical/Tropical Seasonally Wet/Flooded |
suitable |
breeding |
| Shrubland |
Mediterranean-type Shrubby Vegetation |
suitable |
non-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 |
non-breeding |
| Wetlands (inland) |
Permanent Rivers/Streams/Creeks (includes waterfalls) |
suitable |
breeding |
| Wetlands (inland) |
Seasonal/Intermittent Saline, Brackish or Alkaline Lakes and Flats |
suitable |
breeding |
|
Altitude
|
0 - 0 m
|
Occasional altitudinal limits
|
|
Threats & impact
| Threat (level 1) |
Threat (level 2) |
Impact and Stresses |
| Human intrusions & disturbance |
Recreational activities |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
No decline |
Low Impact: 4 |
| Stresses |
|---|
| Species disturbance |
|
| Natural system modifications |
Other ecosystem modifications |
Timing |
Scope |
Severity |
Impact |
| Future |
Majority (50-90%) |
Slow, Significant Decline |
Low Impact: 4 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion, Reduced reproductive success |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Avian Botulism (Clostridium botulinum) |
Timing |
Scope |
Severity |
Impact |
| Future |
Minority (<50%) |
Rapid Declines |
Low Impact: 4 |
| Stresses |
|---|
| Species mortality |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Unspecified birds |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
No decline |
Low Impact: 4 |
|
| Climate change & severe weather |
Habitat shifting & alteration |
Timing |
Scope |
Severity |
Impact |
| Future |
Whole (>90%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
Utilisation
| Purpose |
Primary form used |
Life stage used |
Source |
Scale |
Level |
Timing |
| Food (human) |
Whole |
Adults and juveniles |
Wild |
Subsistence, National |
Non-trivial |
Recent |
| Pets |
Whole |
Adults and juveniles |
Wild |
International |
Non-trivial |
Recent |
| Sport |
Whole |
Adults and juveniles |
Wild |
Subsistence, National |
Non-trivial |
Recent |
Recommended citation
BirdLife International (2013) Species factsheet: Tadorna cana. Downloaded from
http://www.birdlife.org on 22/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 22/05/2013.
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.
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