IUCN Red List Criteria
| Critically Endangered |
A2bce+3bce+4bce |
| Endangered |
A2bce+3bce+4bce;B1ab(v);C2a(ii) |
| Vulnerable |
A2bce+3bce+4bce;B1ab(v);C1+2a(i,ii);D1 |
IUCN Red List history
| Year |
Category |
| 2012 |
Critically Endangered |
| 2009 |
Endangered |
| 2008 |
Near Threatened |
| 2007 |
Near Threatened |
| 2006 |
Near Threatened |
| 2004 |
Near Threatened |
| 2000 |
Lower Risk/Near Threatened |
| 1994 |
Lower Risk/Near Threatened |
| 1988 |
Threatened |
Species attributes
| Migratory status |
full migrant |
Forest dependency |
Does not normally occur in forest |
| Land mass type |
continent
|
Average mass |
575 g
|
Distribution
| |
Estimate |
Data quality |
| Extent of Occurrence breeding/resident (km2) |
920 |
medium |
| Extent of Occurrence non-breeding (km2) |
920 |
medium |
| Number of locations |
2-5 |
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
660-800 |
poor |
Suspected |
2011 |
| Population trend |
Decreasing |
good |
|
- |
| Number of subpopulations |
1 |
- |
- |
- |
| Largest subpopulation |
251-1000 |
- |
- |
- |
| Generation length (yrs) |
7.1 |
- |
- |
- |
|
Population justification: O'Donnell and Fjeldsa (1997) estimated the population to number 3,000-5,000 individuals. The minimum population size, based on simultaneous winter counts during 2010-2011, is 759 (Roesler et al. 2011b). Following recent and rapid declines, and new surveys, the latest estimate is 1,000-1,200 individuals, roughly equivalent to 660-800 mature individuals. |
|
Trend justification: Censuses on the wintering grounds indicated that the population may have declined by as much as 40% since the late 1990s. Assuming an exponential rate of decline this equates to a population decline of 72.5% over 21.4 years. This trend is also supported by recent surveys of the breeding grounds. During the winter counts of 2010 and 2011 no juvenile Hooded Grebes were observed (Roesler et al. 2011b). |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Argentina |
Native |
No |
Yes |
|
|
| Chile |
Native |
No |
Yes |
|
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| Argentina |
Estuario del Río Coyle |
 |
| Argentina |
Estuario del Río Gallegos |
|
| Argentina |
La Angostura y Alto Río Chico |
|
| Argentina |
Meseta del Asador (o Aguila) |
|
| Argentina |
Meseta Lago Buenos Aires |
|
| Argentina |
Meseta Lago Strobel |
|
| Argentina |
Parque Nacional Perito Moreno y Reserva Provincial San Lorenzo |
|
| Argentina |
Península y Bahía de San Julián |
|
| Chile |
Monumento Natural Laguna de los Cisnes |
|
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Marine Neritic |
Estuaries |
major |
non-breeding |
| Wetlands (inland) |
Permanent Freshwater Lakes (over 8ha) |
major |
breeding |
| Wetlands (inland) |
Permanent Freshwater Lakes (over 8ha) |
major |
non-breeding |
|
Altitude
|
500 - 1200 m
|
Occasional altitudinal limits
|
|
Threats & impact
| Threat (level 1) |
Threat (level 2) |
Impact and Stresses |
| Agriculture & Aquaculture |
Livestock farming & ranching / Small-holder grazing, ranching or farming |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Negligible declines |
Low Impact: 5 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Energy production & mining |
Mining & quarrying |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Negligible declines |
Low Impact: 5 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Invasive non-native/alien species/diseases |
Problematic native species/diseases |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Negligible declines |
Low Impact: 4 |
| Stresses |
|---|
| Species mortality |
|
| Invasive non-native/alien species/diseases |
Viral/prion-induced diseases / American Mink (Neovison vison) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Very Rapid Declines |
High Impact: 8 |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Domestic Sheep (Ovis aries) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Negligible declines |
Low Impact: 4 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Rainbow Trout (Oncorhynchus mykiss) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Whole (>90%) |
Rapid Declines |
High Impact: 8 |
| Stresses |
|---|
| Competition, Species mortality |
|
| Geological events |
Volcanoes |
Timing |
Scope |
Severity |
Impact |
| Future |
Whole (>90%) |
Negligible declines |
Low Impact: 4 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion, Reduced reproductive success, Species mortality |
|
| Climate change & severe weather |
Habitat shifting & alteration |
Timing |
Scope |
Severity |
Impact |
| Future |
Whole (>90%) |
Unknown |
Unknown |
| Stresses |
|---|
| Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion |
|
Recommended citation
BirdLife International (2013) Species factsheet: Podiceps gallardoi. Downloaded from
http://www.birdlife.org on 23/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 23/05/2013.
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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