Population information

Nom ordre Anseriformes
Nom famille Anatidae
Nom scientifique Aythya australis Nom courant Hardhead
Nom population extima
Aire de reproduction Vanuatu (New Hebrides) Aire de non-reproduction
Catégorie de la Liste Rouge Least Concern
Regions Ramsar Oceania
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 1 0 0 1 2,000 No quality assessment [R214]
WPE 2 0 0 1 1,000 No quality assessment [R116]
WPE 3 0 0 1 1,000 No quality assessment [R627]
WPE 4 0 0 1 1,000 No quality assessment [R627]
WPE 5 0 0 1 1,000 No quality assessment [R627]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 1972 1992 STA No quality assessment [R214]
WPE 2 0 0 Unknown No quality assessment
WPE 3 0 0 Unknown No quality assessment
WPE 4 0 0 Unknown No quality assessment
WPE 5 0 0 Unknown No idea

Population 1% level

Publication Yearset 1 percent Note
WPE 1 1994 20
WPE 2 1997 10
WPE 3 2002 10
WPE 4 2006 10
WPE 5 2012 1

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.
  • R116 - Callaghan, D.A. (Comp.). (in press). Ducks, geese, swans and screamers: an Action Plan for the conservation of Anseriformes.
  • R627 - Threatened Waterfowl Specialist Group. In prep. 2002.Global Action Plan for the Conservation of Anseriformes (Ducks, Geese, Swans and Screamers). IUCN, Gland, Switzerland.

Notes




Copyright Wetlands International 2012

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