Population information

Order name Podicipediformes
Family name Podicipedidae
Scientific name Podiceps nigricollis Common name Black-necked Grebe
Population name californicus
Breeding range W & Central North America Non-breeding range S North America, Pacific USA coast
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 2,500,000 2,500,000 [R343]
WPE 2 0 0 2,500,000 2,500,000 [R343]
WPE 3 0 0 3,700,000 3,700,000 [R344]
WPE 4 0 0 3,700,000 3,700,000 [R344]
WPE 5 0 0 3,700,000 3,700,000 Expert opinion [S7577] [R344]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 1966 1991 INC [R635]
WPE 2 1966 1996 INC [R565]
WPE 3 1990 2000 STA [R344]
WPE 4 1990 2000 STA [R344]
WPE 5 1990 2012 STA [T3949] [R1097]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 1994 20000
WPE 2 1997 20000
WPE 3 2002 20000
WPE 4 2006 20000
WPE 5 2012 37000

References

  • R343 - Jehl, J.R. jr. 1988. Biology of the Eared Grebe and Wilson's Phalarope in the non-breeding season: a study of adaptations to saline lakes. Studies in Avian Biology 12: 1-74. Cooper Ornithological Society.
  • R635 - Trapp, J. (pers. comm.). 1993. Unpublished data from the North American Breeding Bird Survey 1966-1991 compiled by USFWS for IWRB.
  • R565 - Sauer, J.R., Schwartz, S., Peterjohn, B.G. and Hines, J.E. 1996. The North American Breeding Bird Survey Home Page. Version 94.3 Natl. Biol. Serv., Patuxtent Wildlife Research Center, Laurel MD. URL: http://www.mbr.nbs.gov/bbs/bbs.html.
  • R344 - Jehl, J.R. jr. 2001. The abundance of the Eared (Black-necked) Grebe as a recent phenomenon. Waterbirds 24: 245-249.
  • R1097 - Jehl, J. In litt. 2012.

Notes

  • S7577 - No change (Jehl, J. In litt. 2012)
  • T3949 - No change (Jehl, J. In litt. 2012)



Copyright Wetlands International 2012

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