Population information

Order name Anseriformes
Family name Anatidae
Scientific name Anas wyvilliana Common name Hawaiian Duck
Population name Hawaii
Breeding range Main Hawaiian Islands Non-breeding range
Red List Category Endangered
Ramsar regions Oceania
Notes Sometimes considered conspecific with platyrhynchos. Considered as a single population since WPE3.

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 2,525 2,525 [R652]
WPE 4 0 0 2,525 2,525 [R652]
WPE 1 0 0 2,500 2,500 [R115]
WPE 2 0 0 200 2,000 [R115]
WPE 5 2000 2007 2,520 2,530 Census based [S8000] [R652] [R1176]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1984 2002 STA [R652]
WPE 4 1984 2002 STA [R652]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 5 2000 2007 INC Good [T6007] [R1176]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 25
WPE 4 2006 25
WPE 1 1994 25
WPE 2 1997 23
WPE 5 2012 25

References

  • R652 - U.S. Fish and Wildlife Service. 2002. Draft Revised Recovery Plan for Hawaiian Waterbirds, Second Revision. USFWS Region 1., Portland, Oregon, Code U9.
  • R115 - Callaghan, D.A. and Green, A.J. 1993. Wildfowl at risk, 1993. Wildfowl 44: 149-169.
  • R1176 - U.S. Fish and Wildlife Service. 2011b. Recovery Plan for Hawaiian Waterbirds, Second Revision. U.S. Fish and Wildlife Service, Portland, Oregon. xx + 233 pp. Online http://ecos.fws.gov/docs/recovery_plan/Hawaiian%20Waterbirds%20RP%202nd%20Revision.pdf

Notes

  • S8000 - Substantial numbers in montane areas that are not surveyed. Average total from winter counts 2000-2007 is 360 birds. Larger WPE4 estimate presumably accounts for the unsurveyed montane birds; thus no change to estimate.
  • T6007 - Trend is increasing but status difficult to judge due to the presence of feral and hybrid ducks.



Copyright Wetlands International 2012

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