Population information

Order name Anseriformes
Family name Anatidae
Scientific name Tadorna tadorna Common name Common Shelduck
Population name Western Asia/Caspian & Middle East
Breeding range W & SW Asia Non-breeding range Caspian, SW Asia
Red List Category Least Concern
Ramsar regions Asia Europe
Notes

Conservation Framework

Conservation framework Notes
AEWA
CAF Action Plan
EUBD
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 1 1987 1991 80,000 80,000 [R519]
WPE 2 1987 1991 80,000 80,000 [R519]
WPE 3 1987 1991 80,000 80,000 [R519]
WPE 4 1987 1991 80,000 80,000 [R519]
WPE 5 1987 1991 80,000 80,000 Expert opinion [R519]
CSR 4 1987 1991 80,000 80,000 Expert opinion [R519]
CSR 5 1987 1991 80,000 80,000 Expert opinion [R519]
CSR 6 2013 2013 30,000 50,000 Expert opinion [S8523] [R1365] [R519]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 1977 1991 INC [R519]
WPE 2 1977 1991 INC [R519]
WPE 3 1977 1991 INC [R519]
WPE 4 1977 1991 INC [R519]
WPE 5 1997 2007 Unknown No idea [T5915]
CSR 4 1987 1991 INC Poor
CSR 5 1997 2007 Unknown Poor [T3168] [R888]
CSR 6 2003 2012 DEC Poor [T6519] [R1365] [R1381]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 1994 800
WPE 2 1997 800
WPE 3 2002 800
WPE 4 2006 800
WPE 5 2012 800
CSR 4 0 -1
CSR 5 0 -1
CSR 6 0 -1

References

  • R519 - Perennou, C.P., Mundkur, T. and Scott, D.A. 1994. The Asian Waterfowl Census 1987-1991: distribution and status of Asian waterfowl. IWRB Spec. Publ. No. 24; AWB Spec. Publ. No. 86. Slimbridge, UK and Kuala Lumpur, Malaysia.
  • 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
  • R1365 - Wetlands International, International Waterbird Census, unpublished data, 2014.
  • 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

  • T5915 - Wetlands International 2012. Trend 1988-2007: +0.1% p.a. ? Uncertain. Only 110 sites included in analysis, 82 of them in one country, Iran causing bias in analysis.
  • T3168 - 898. Trend 1988-2007: +0.1% p.a. – Uncertain. Only 110 sites included in analysis, 82 of them in one country, Iran causing bias in analysis.
  • S8523 - The current estimate is based on Perennou et al. (1994) using data up to 1991. Large counts of 73,947 (1995), 78,138 (1996) and even 157,594 individuals (1999) continued in the 1990s. There is a marked decline even in the count totals adjusted for missing counts after 2005. The sum of the site-level 5-year-means for the period of 2008-2012 was 31,391 individuals. 30,369 individuals were also counted in 2013. However, counts are concentrated in IR, IQ and AZ and thousands of birds might be missed. Therefore, the revised estimate is 30,000-50,000 individuals.
  • T6519 - Counts are from 15 countries of the region, but regular count data are available only from IR and AZ. Thus the trend might be sensitive to unrecorded range shift and cold weather movements. High peaks are probably the results of the latter. In the absence of evidence to the contrary, the population thought to be in significant long-term decline.
  • T6908 - Significant long-term decline.



Copyright Wetlands International 2012

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