Southern Silvery Grebe (Podiceps occipitalis)

Southern Silvery Grebe Podiceps occipitalis

Current view: Data table and detailed info

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
Severely fragmented?	no	-

Population and trend

	Value	Data quality	Derivation	Year of estimate
Number of mature individuals				0
Population trend	decreasing		suspected	-
Generation length (years)	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	Presence	Origin	Resident	Breeding	Non-breeding
Argentina	extant	native	yes	yes	yes
Bolivia	extant	native			yes
Chile	extant	native	yes	yes	yes
Falkland Islands (Malvinas)	extant	native	yes
Paraguay	extant	native			yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Argentina	Lagunas Encadenadas del Oeste de la Provincia de Buenos Aires
Chile	Humedal de Batuco
Argentina	Lagunas del suroeste y relictos del Caldenal
Argentina	Bañados del Río Atuel

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 (2023) Species factsheet: Podiceps occipitalis. Downloaded from http://datazone.birdlife.org/species/factsheet/southern-silvery-grebe-podiceps-occipitalis on 01/10/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 01/10/2023.