Population information

Order name Anseriformes
Family name Anatidae
Scientific name Melanitta deglandi Common name White-winged Scoter
Population name N America
Breeding range Alaska, Canada E to Hudson Bay Non-breeding range Atlantic & Pacific coasts N America
Red List Category Least Concern
Ramsar regions North America
Notes The British Ornithologists' Union has accepted the separation of fusca and deglandii as different species, with stejnegeri comprising a subspecies of deglandi. (WPE4). However BirdLife 2012 taxonomic review recognised Melanitta stejnegeri as a distinct species.

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 4 0 0 100,000 1,000,000 [S5689] [R214]
WPE 1 0 0 1,000,000 1,000,000 [R214]
WPE 2 0 0 1,000,000 1,000,000 [R214]
WPE 3 0 0 1,000,000 1,000,000 [R214]
WPE 5 0 0 140,000 240,000 Expert opinion [R214] [R698]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 4 1972 1992 DEC [R214]
WPE 1 1972 1992 STA [R214]
WPE 2 1972 1992 STA [R214]
WPE 3 1972 1992 STA [R214]
WPE 5 0 0 DEC [T6165] [R1180]

Population 1% level

Publication Yearset 1 percent Note
WPE 4 2006 10000
WPE 1 1994 10000
WPE 2 1997 10000
WPE 3 2002 10000
WPE 5 2012 1800

References

  • R214 - Ellis-Joseph, S., Hewston, N. and Green, A. (compilers). 1992. Global Waterfowl Conservation Assessment and Management Plan: First Review Draft. Report by the IUCN Captive Breeding Specialist Group and The Wildfowl and Wetlands Trust. 1992. 77 pp.
  • R698 - Wilkins, K. A. and M. C. Otto. 2003. Trends in duck breeding populations, 1955-2003. U.S. Fish and Wildlife Service unpublished report. http://migratorybirds.fws.gov/reports/status03/trend.pdf
  • R1180 - U.S. Fish and Wildlife Service. 2011d. Waterfowl population status, 2011. U.S. Department of the Interior, Washington, D.C. USA.

Notes

  • S5689 - The previous estimate of 1,000,000 is incorrect as in North America, Melanitta fusca is much less numerous than either M. nigra or M. perspicillata. In the BNA account they speculate a population of about 555 000 birds. This may still be high. Population size of M. fusca is likely much smaller than that of the other two scoter species.
  • T6165 - Population trend on continental scale (where surveyed) is declining. Population trend in eastern Canada has been stable since 1990.



Copyright Wetlands International 2012

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