Junin Grebe Podiceps taczanowskii


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: #

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
C2a(ii) B1ab(iii,v); C2a(i,ii); D B1ab(iii,v); C2a(i,ii); D1+2

Red List history
Year Category Criteria
2019 Critically Endangered C2a(ii)
2018 Critically Endangered C2a(ii)
2016 Critically Endangered C2a(ii)
2015 Critically Endangered C2a(ii)
2013 Critically Endangered C2a(ii)
2012 Critically Endangered C2a(ii)
2010 Critically Endangered C2a(ii)
2009 Critically Endangered C2a(ii)
2008 Critically Endangered
2006 Critically Endangered
2004 Critically Endangered
2000 Critically Endangered
1996 Critically Endangered
1994 Critically Endangered
1988 Threatened
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 140 medium
Number of locations 1 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 140-320 medium estimated 2016
Population trend Decreasing good estimated -
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 1 - - -
Largest subpopulations 100 - - -
Generation length (yrs) 7.1 - - -

Population justification: Different survey methods and identification challenges have made population estimates difficult. However, surveys between 2007 and 2016 indicate a population of between 217 and 468 individuals (ECOAN 2009, Engblom 2016a, b, Chamorro and Aucca 2017, Dinesen et al. 2019), roughly equating to 145 - 312 mature individuals, rounded here to 140 - 320 mature individuals.

Trend justification: Trends for this species are unclear due to difficulties in carrying out reliable surveys and an apparently fluctuating population size. Counts over recent years do not indicate an overall decline, but the trend is precautionarily retained as declining due to the high level of uncertainty.

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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Peru Lago de Junín

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) major resident
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) major resident
Altitude 4080 - 4080 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Other impacts Timing Scope Severity Impact
Ongoing Whole (>90%) Causing/Could cause fluctuations Medium Impact: 7
Reduced reproductive success, Species mortality
Natural system modifications Dams & water management/use - Dams (size unknown) Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Ecosystem degradation, Ecosystem conversion, Reduced reproductive success
Pollution Domestic & urban waste water - Sewage Timing Scope Severity Impact
Ongoing Whole (>90%) Unknown Unknown
Ecosystem degradation
Pollution Industrial & military effluents - Seepage from mining Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2020) Species factsheet: Podiceps taczanowskii. Downloaded from on 03/04/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from on 03/04/2020.