Population information

Order name Anseriformes
Family name Anatidae
Scientific name Tadorna cana Common name South African Shelduck
Population name Southern Africa
Breeding range Southern Africa Non-breeding range
Red List Category Least Concern
Ramsar regions Africa
Notes

Conservation Framework

Conservation framework Notes
AEWA
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 1 0 0 42,000 42,000 [R94]
WPE 2 0 0 42,000 42,000 [R94]
WPE 4 0 0 50,000 50,000 [R292]
WPE 3 0 0 50,000 50,000 [R295]
WPE 5 1996 1996 50,000 50,000 Census based [R295]
CSR 5 1996 1996 50,000 50,000 Census based [R295]
CSR 4 1996 1996 50,000 50,000 Census based [R295]
CSR 6 1996 1996 50,000 50,000 Census based [S8682] [R295] [R1371]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 1972 1982 STA [R94]
WPE 2 1972 1982 STA [R94]
WPE 4 1980 1996 INC [R295]
WPE 3 1991 2001 STA [R190]
WPE 5 1997 2007 DEC Poor [T5908] [R888]
CSR 5 1997 2007 DEC Poor [T3146] [R888]
CSR 4 0 0 INC Poor
CSR 6 2003 2012 DEC Reasonable [T6663] [R1381] [R1371]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 1994 420
WPE 2 1997 420
WPE 4 2006 500
WPE 3 2002 500
WPE 5 2012 500
CSR 5 0 -1
CSR 4 0 -1

References

  • R94 - Brown, L.H., Urban, E.K. and Newman, K. 1982. The Birds of Africa. Volume I. Academic Press, London and New York.
  • R292 - Harebottle, D., in litt. 2002.
  • R295 - Harrison, J.A., Allan, D.G., Underhill, L.G., Herremans, M., Tree, A.J., Parker, V. and Brown, C.J. (1997). The Atlas of Southern African Birds. Vol.1. BirdLife South Africa, Johannesburg. 785 pp.
  • R190 - Dodman, T. 2002. Waterbird Population Estimates in Africa. Unpublished report to Wetlands International.
  • R888 - Wetlands International, 2012. Results of trend analysis undertaken for CSR5 2012, presented in Annex 4. http://www.unep-aewa.org/meetings/en/mop/mop5_docs/pdf/mop5_14_csr5.pdf
  • R1371 - Dodman, T. 2014. Status, Estimates and Trends of Waterbird Populations in Africa: AEWA-listed African populations. Wetlands International. (CSR6 African populations) URL: https://www.wetlands.org/publications/1304/
  • R1381 - Nagy, S., Flink, S., Langendoen, T. (2014) Waterbird trends 1988-2012: Results of trend analyses of data from the International Waterbird Census in the African-Eurasian Flyway. Wetlands International, Ede.
  • R1548 - Wetlands International (2017) Flyway trend analyses based on data from the African-Eurasian Waterbird Census from the period of 1967-2015. Ede, The Netherlands: Wetlands International. Temporary URL: https://www.dropbox.com/sh/r76f4eyuhzu65co/AADzzQkhySsUDsmwFJUcHs91a?dl=0

Notes

  • T5908 - Wetlands International 2012. Trend 1994-2007: -3.7% p.a. ? Significant long-term decline.
  • T3146 - 898. Trend 1994-2007: -3.7% p.a. – Significant long-term decline.
  • S8682 - lack of new qualitative data or published reports to consider change in light of suspected decline as reflected by IWC data.
  • T6663 - IWC data (TRIM) suggest decline of 10.4% 2003-20012; signifcant increases in past with range expansion. Significant long-term decline.
  • T6905 - The population is likely to fluctuate. Therefore, the long-term trend is reported.



Copyright Wetlands International 2012

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