Population information

Nom ordre Anseriformes
Nom famille Anatidae
Nom scientifique Anas gracilis Nom courant Grey Teal
Nom population gracilis, Australia, New Guinea
Aire de reproduction Australia, New Guinea, New Britain, New Caledonia Aire de non-reproduction
Catégorie de la Liste Rouge Least Concern
Regions Ramsar Oceania
Notes Often considered conspecific with A gibberifrons.

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 4 2003 2003 1,000,000 1,000,001 [S5285] [R341]
WPE 1 0 0 -1 -1
WPE 2 0 0 25,000 1,000,000
WPE 3 0 0 25,000 1,000,000 [R455]
WPE 5 2004 2011 100,000 1,000,001 Best guess [S8033] [R341] [R1112] [R1148] [R1149]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 4 1990 2000 FLU [R341]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 0 0 Unknown
WPE 5 1982 2011 FLU Poor [T6040] [R1148] [R1101]

Population 1% level

Publication Yearset 1 percent Note
WPE 4 2006 20000
WPE 1 0 -1
WPE 2 0 -1
WPE 3 0 -1
WPE 5 2012 20000

References

  • R341 - Jaensch, Roger, August 2005. Detailed data and notes on numbers and distribution of waterbirds in Australia, updated from Jaensch, 2003, and derived from more than 90 Australian sources including Wetlands International, Birds Australia and Jaensch, 2003,
  • R455 - Miyabayashi, Y. and Mundkur, T. 1999. Atlas of Key Sites for Anatidae in the East Asian Flyway. Wetlands International ? Japan ? Tokyo, and Wetlands International ? Asia Pacific, Kuala Lumpur. 148 pp.
  • R1112 - Kingsford, R.T., Porter, J.L. and Halse, S.A. 2012. National waterbird assessment. Waterlines report, National Water Commission, Canberra. Available online at http://nwc.gov.au/publications/waterlines/74
  • R1148 - Porter, J.L. and Kingsford, R.T. 2011. Aerial Survey of Wetland Birds in Eastern Australia - October 2011. Annual Summary Report, Australian Wetlands and Rivers Centre, University of New South Wales. 29 pp. Also available online at http://www.wetrivers.unsw.edu.au/wp-content/uploads/2011/12/Eastern-Australia_waterbird-aerial-survey_2011.pdf
  • R1149 - Reid, J.R.W., Kingsford, R.T. and Jaensch, R.P. 2009. Waterbird Surveys in the Channel Country Floodplain Wetlands, Autumn 2009. Report by Australian National University, Canberra, University of New South Wales, Sydney, and Wetlands International, Oceania, Brisbane, for the Australian Government Department of Environment, Water, Heritage and the Arts. 81 pp. Also available online at http://www.lebmf.gov.au/publications/pubs/waterbirds-report.pdf
  • R1101 - Jaensch, R. April 2012. Detailed data and notes on numbers and trends of waterbirds in Australia and other parts of the Oceania region, in a spreadsheet prepared for Wetlands International - Oceania for the 5th edition of WPE.

Notes

  • S5285 - 344: "Australia's most abundant (true) duck". Aerial survey data (490) suggest population size in Australia can exceed 2 million. Population of New Britain + New Caledonia 1,500-3,000 (42).
  • S8033 - Estimate takes account of the huge fluctuations in numbers between major drought and wet periods.
  • T6040 - Some sub-regions are less viable as breeding habitat than 30 years ago, due to river regulation and irrigation, but overall dominant trend is fluctuating.



Copyright Wetlands International 2012

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