Clark's Grebe (Aechmophorus clarkii) - BirdLife species factsheet

Clark's Grebe Aechmophorus clarkii

Current view: Data table and detailed info

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. 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
2012	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Species attributes

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

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	6,220,000 km²	medium
Extent of Occurrence (non-breeding)	2,000,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	7300-14000 mature individuals	poor	estimated	2009
Population trend	decreasing	-	estimated	-
Generation length	8 years	-	-	-

Population justification: The population is estimated to number 11,000-21,000 individuals, roughly equating to 7,300-14,000 mature individuals.

Trend justification: This species has undergone a small or statistically insignificant decrease over the last 40 years in North America (data for Aechmophorus occidentalis and A. clarkii combined, from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007).

Country/territory distribution

Country/Territory	Presence	Origin	Breeding visitor
Canada	extant	native	yes
Mexico	extant	native
USA	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Mexico	Ciénega de Tláhuac
Mexico	Complejo Lagunar Ojo de Liebre
Mexico	Cuitzeo
Mexico	Lago de Texcoco
Mexico	Laguna de Bustillos
Mexico	Presa Laguna de Zumpango
Mexico	Santiaguillo
Mexico	Subcuenca Tecocomulco
USA	Bill Williams River National Wildlife Refuge

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Wetlands (inland)	Permanent Freshwater Lakes (over 8ha)	major	breeding
Altitude	750 - 2500 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Clark's Grebe Aechmophorus clarkii. Downloaded from https://datazone.birdlife.org/species/factsheet/clarks-grebe-aechmophorus-clarkii on 22/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 22/11/2024.