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Hooded Grebe Podiceps gallardoi

IUCN Red List Criteria

Critically Endangered A2bce+3bce+4bce 
Endangered A2bce+3bce+4bce;B1ab(v);C1+2a(i,ii);D1 
Vulnerable A2bce+3bce+4bce;B1ab(v);C2a(ii) 

IUCN Red List history

Year Category
2013 Critically Endangered
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) 43,200 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, borne out by the comprehensive 2013 survey's total of 691 adults and 144 chicks (Casañas et al. 2013).
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 72.5% 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 distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Argentina Native Extant Yes      
Chile Native Extant Yes      

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Argentina Estuario del Río Coyle site factsheet
Argentina Estuario del Río Gallegos site factsheet
Argentina La Angostura y Alto Río Chico site factsheet
Argentina Meseta del Asador (o Aguila) site factsheet
Argentina Meseta Lago Buenos Aires site factsheet
Argentina Meseta Lago Strobel site factsheet
Argentina Parque Nacional Perito Moreno y Reserva Provincial San Lorenzo site factsheet
Argentina Península y Bahía de San Julián site factsheet
Chile Monumento Natural Laguna de los Cisnes site factsheet

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
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Indirect ecosystem effects, Ecosystem degradation
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
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
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
Stresses
Reduced reproductive success, Species mortality
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
Stresses
Competition, Species mortality
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
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Problematic native species/diseases Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species mortality

Recommended citation
BirdLife International (2014) Species factsheet: Podiceps gallardoi. Downloaded from http://www.birdlife.org on 21/10/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/10/2014.

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.

Key facts
Current IUCN Red List category Critically Endangered
Family Podicipedidae (Grebes)
Species name author Rumboll, 1974
Population size 660-800 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 43,200 km2
Country endemic? No
Links to further information
- Summary information on this species