Population information

Order name Podicipediformes
Family name Podicipedidae
Scientific name Aechmophorus clarkii Common name Clark's Grebe
Population name transitionalis
Breeding range W North America Non-breeding range S & Pacific USA to Baja California
Red List Category Least Concern
Ramsar regions North America
Notes

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 1 0 0 1 25,000 [R8]
WPE 2 0 0 10,000 100,000 [R667]
WPE 3 0 0 10,000 20,000 [R344]
WPE 4 0 0 10,000 20,000 [R344]
WPE 5 2001 2011 10,000 20,000 Census based [S7587] [R1274]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 0 0 Unknown
WPE 4 0 0 Unknown
WPE 5 0 0 Unknown No idea

Population 1% level

Publication Yearset 1 percent Note
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 150
WPE 4 2006 150
WPE 5 2012 140

References

  • R8 - American Ornithologists Union. (in press). Birds of North America. Philadelphia. The Academy of Natural Sciences, Washington DC.
  • R667 - Unpublished information supplied by Wetlands International Specialist Groups, 1997.
  • R344 - Jehl, J.R. jr. 2001. The abundance of the Eared (Black-necked) Grebe as a recent phenomenon. Waterbirds 24: 245-249.
  • R1274 - Environment Canada. 2012. Status of Birds in Canada 2011: http://www.ec.gc.ca/soc-sbc/index-eng.aspx?sY=2010andsL=e)

Notes

  • S7587 - 500-1000 individuals estimated in Canada (Environment Canada 2012); start yr based on Kushlan et al 2002; end year based on Canada estimate.



Copyright Wetlands International 2012

Citation: Wetlands International (). "Waterbird Population Estimates" . Retrieved from wpe.wetlands.org on