LC
Southern Silvery Grebe Podiceps occipitalis



Taxonomy

Taxonomic note
Podiceps occipitalis and P. juninensis (del Hoyo and Collar 2014) were previously lumped as P. occipitalis following Sibley and Monroe (1990, 1993).

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.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Least Concern
2014 Least Concern
Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 3,460,000 medium
Extent of Occurrence non-breeding (km2) 5,200,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 0
Population trend Decreasing suspected -
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) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 7.1 - - -

Population justification: The population size has not been quantified owing to recent taxonomic splits.

Trend justification: The overall population trend is decreasing, although some populations may be stable and others have unknown trends (Wetlands International 2006).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Argentina N Extant Yes Yes Yes
Bolivia N Extant Yes
Chile N Extant Yes Yes Yes
Falkland Islands (Malvinas) N Extant Yes
Paraguay N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Argentina Lagunas del suroeste y relictos del Caldenal
Argentina Bañados del Río Atuel
Paraguay Parque Nacional Tinfunqué - Estero Patiño
Chile Humedal de Batuco
Chile Monumento Natural Laguna de los Cisnes
Argentina Lagunas Encadenadas del Oeste de la Provincia de Buenos Aires

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Marine Neritic Pelagic marginal non-breeding
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) major resident
Wetlands (inland) Permanent Saline, Brackish or Alkaline Lakes suitable non-breeding
Altitude 0 - 1500 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2022) Species factsheet: Podiceps occipitalis. Downloaded from http://www.birdlife.org on 01/10/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 01/10/2022.