Data Zone
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.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| A2bce+3bce+4bce | A2bce+3bce+4bce;B1ab(v);C2a(ii) | A2bce+3bce+4bce;B1ab(v);C1+2a(i,ii);D1 |
| Year | Category | Criteria |
|---|---|---|
| 2016 | Critically Endangered | A2bce+3bce+4bce |
| 2015 | Critically Endangered | A2bce+3bce+4bce |
| 2013 | Critically Endangered | A2bce+3bce+4bce |
| 2012 | Critically Endangered | A2bce+3bce+4bce |
| 2009 | Endangered | A2b,c,e; A3b,c,e; A4b,c,e |
| 2008 | Near Threatened | |
| 2007 | Near Threatened | |
| 2006 | Near Threatened | |
| 2004 | Near Threatened | |
| 2000 | Lower Risk/Near Threatened | |
| 1994 | Lower Risk/Near Threatened | |
| 1988 | Threatened |
| Migratory status | full migrant | Forest dependency | Does not normally occur in forest |
| Land mass type |
Land-mass type - continent |
Average mass | 575 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 43,500 | medium |
| Extent of Occurrence non-breeding (km2) | 1,600 | medium |
| Number of locations | 2-5 | - |
| Fragmentation | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 660-800 | poor | suspected | 2011 |
| Population trend | Decreasing | good | observed | - |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | 81 | - | - | - |
| Decline (10 years/3 generation past and future) | 81 | - | - | - |
| Number of subpopulations | 1 | - | - | - |
| Largest subpopulations | 100 | - | - | - |
| 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, borne out by the comprehensive 2013 survey's total of 691 adults and 144 chicks (Casañas et al. 2013) and the 2014-2015 survey total of 771 adults and 138 chicks (Roesler et al. 2015).
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 an extremely rapid population decline of over 80 % over 21 years (three generations). 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 | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Argentina | N | Extant | Yes | |||
| Chile | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Argentina | Confluencia, desembocadura y adyacencias de los ríos Chico y Santa Cruz |
| 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 |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Marine Neritic | Estuaries | major | non-breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | major | non-breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | major | breeding |
| Altitude | 500 - 1200 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Livestock farming & ranching | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
|
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| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Rapid Declines | High Impact: 8 | ||||||
|
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| Energy production & mining | Mining & quarrying | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
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| Geological events | Volcanoes | Timing | Scope | Severity | Impact | ||||
| Future | Whole (>90%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Very Rapid Declines | High Impact: 8 | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Rapid Declines | High Impact: 8 | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Invasive and other problematic species, genes & diseases | Problematic native species/diseases | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
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Recommended citation
BirdLife International (2018) Species factsheet: Podiceps gallardoi. Downloaded from
http://www.birdlife.org on 21/05/2018.
Recommended citation for factsheets for more than one species: BirdLife International (2018) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 21/05/2018.
