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 U.S. Fish and Wildlife Service unpublished report.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