CR
Hooded Grebe Podiceps gallardoi



Taxonomy

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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
A2abce+4ace A2abce+4ace A2abce+4ace; D1

Red List history
Year Category Criteria
2018 Critically Endangered A2abce+4ace
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
Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type Land-mass type - continent
Average mass 575.0 g
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 47,300 medium
Extent of Occurrence non-breeding (km2) 7,200 medium
Number of locations 2-5 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 660-800 good estimated 2017
Population trend Stable 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) - - -
Decline (10 years/3 generation past and future) 60-80 - - -
Number of subpopulations 1 - - -
Largest subpopulations 100 - - -
Generation length (yrs) 7.1 - - -

Population justification: The population was estimated the population to number 3,000-5,000 individuals in the mid-1980s (Fjeldsa 1984). Following recent and rapid declines, new surveys estimated 1,000-1,200 individuals, roughly equivalent to 660-800 mature individuals, borne out by the breeding survey counts of 691 adults and 144 chicks in 2013 (Casañas et al. 2013), 771 adults and 138 chicks in 2014-15 (Roesler et al. 2015), 753 adults and 187 chicks in 2015-16 (Roesler et al. 2016b) and 749 adults and 130 chicks in 2016-17 (Roesler et al. 2017).

Trend justification: The latest population estimate is 1,000-1,200 individuals, roughly equivalent to 660-800 mature individuals, represents a population reduction of approximately 60-80% over three generation lengths. By comparing the total counts made across the same 58 lagoons in 1984-5 (2,352 individuals) and 2010-11 (471 individuals), the overall population reduction was estimated at 80% over 26 years (Roesler et al. 2012, Roesler 2016), which is equivalent to a 73% reduction over three generation lengths. Nevertheless, it appears from recent counts that the population is now stable, probably as a result of extensive conservation actions.


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

Important Bird and Biodiversity Areas (IBA)
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

Habitats & altitude
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  

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
Climate change & severe weather Storms & flooding Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Reduced reproductive success, Species mortality
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Energy production & mining Renewable energy Timing Scope Severity Impact
Future Majority (50-90%) Rapid Declines Low Impact: 5
Stresses
Ecosystem degradation
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 - Neovison vison 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 - Oncorhynchus mykiss 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 - Ovis aries 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 - Larus dominicanus Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Tachyeres patachonicus Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Species mortality
Pollution Excess energy - Light pollution Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Stresses
Species disturbance, Ecosystem degradation

Recommended citation
BirdLife International (2019) Species factsheet: Podiceps gallardoi. Downloaded from http://www.birdlife.org on 05/12/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 05/12/2019.