Population information

Nom ordre Anseriformes
Nom famille Anatidae
Nom scientifique Aythya americana Nom courant Redhead
Nom population N America
Aire de reproduction Alaska, W & S Canada, W USA Aire de non-reproduction W, S & SE USA, Mexico
Catégorie de la Liste Rouge Least Concern
Regions Ramsar North America
Notes

Réseau de conservation

Réseau de conservation Notes
Pas des Réseaux de conservation
Note:

Taille de population

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 3 0 0 750,000 750,000 No quality assessment [R651]
WPE 4 0 0 592,000 592,000 No quality assessment [R656]
WPE 1 0 0 595,600 595,600 No quality assessment [R671]
WPE 2 0 0 691,400 691,400 No quality assessment [R657]
WPE 5 2011 2011 1,350,000 1,360,000 Expert opinion [R1202]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1955 2001 STA No quality assessment [R651]
WPE 4 1955 2005 STA No quality assessment [R656]
WPE 1 1982 1992 STA No quality assessment [R671]
WPE 2 1986 1996 INC No quality assessment [R657]
WPE 5 2002 2011 INC No quality assessment [R1202]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 7500
WPE 4 2006 5900
WPE 1 1994 600
WPE 2 1997 6900
WPE 5 2012 13600

References

  • R651 - U.S. Fish and Wildlife Service. 2001. Waterfowl Population Status, 2001. US Department of the Interior,Washington, D.C. 50pp.
  • 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
  • R671 - USFWS and CWS. 1992. 1992 status of waterfowl and fall flight forecast. Usfws Migratory Bird Management Office.
  • 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.
  • R1534 - U.S. Fish and Wildlife Service. 2014. Waterfowl population status, 2014. U.S. Department of the Interior, Washington, D.C. USA.

Notes




Copyright Wetlands International 2012

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