Population information

Order name Anseriformes
Family name Anatidae
Scientific name Aythya marila Common name Greater Scaup
Population name nearctica, North America
Breeding range Alaska, Arctic Canada Non-breeding range Coasts of N America, Great Lakes
Red List Category Least Concern
Ramsar regions North America
Notes Now listed by BOU as Aythya marila nearctica. (WPE4). Proposed namemariloides, sometimes applied to NE Asian and/or North American populations, is invalid, as it was attached to specimens of A. affinis; now replaced by name nearctica.

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 3 0 0 520,000 520,000 [R6]
WPE 4 0 0 561,000 561,000 [R656]
WPE 2 0 0 -1 -1
WPE 1 0 0 -1 -1
WPE 5 2011 2011 4,310,000 4,320,000 Expert opinion [S8115] [R1202]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1955 1998 STA [R6]
WPE 4 1955 1998 STA [R6]
WPE 2 1986 1996 DEC [R657]
WPE 1 0 0 Unknown
WPE 5 1955 1998 STA [R6]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 5200
WPE 4 2006 5600
WPE 2 0 -1
WPE 1 0 -1
WPE 5 2012 43200

References

  • R6 - Allen, George T., David F. Caithamer, and Mark Otto. 1999. A review of the status of greater and lesser scaup in North America. DMBM unbpublished report. 45pp.
  • R656 - U.S. Fish and Wildlife Service. 2005. Waterfowl Population Status, 2005. US Department of the Interior,Washington, D.C. http://www.fws.gov/migratorybirds/reports/status05/final_status_05.pdf
  • R657 - U.S. Fish and Wildlife Service and Canadian Wildlife Service. 1996. Waterfowl Population Status 1996. USFWS, Washington DC.
  • R1202 - Zimpfer, N.L., Rhodes, W.E., Silverman, E.D., Zimmerman, G.S. and Richkus, K.D. 2011. Trends in Duck Breeding Populations, 1955-2011. U.S. Fish and Wildlife Service.

Notes

  • S8115 - Combined



Copyright Wetlands International 2012

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