Population information

Order name Anseriformes
Family name Anatidae
Scientific name Mareca strepera Common name Gadwall
Population name strepera, Western Siberia/SW Asia & NE Africa
Breeding range W Siberia, SW Asia Non-breeding range SW & Central Asia, NE Africa
Red List Category Least Concern
Ramsar regions Africa 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 130,000 130,000 [R519]
WPE 2 1987 1991 130,000 130,000 [R519]
WPE 3 1987 1991 130,000 130,000 [R519]
WPE 4 1987 1991 130,000 130,000 [R519]
WPE 5 1987 1991 130,000 130,000 Expert opinion [R519]
CSR 4 1987 1991 130,000 130,000 Expert opinion [R519]
CSR 5 1987 1991 130,000 130,000 Expert opinion [R519]
CSR 6 2007 2012 90,000 130,000 Expert opinion [S8526] [R1365] [R519] [R1371]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 0 0 Unknown
WPE 4 0 0 Unknown
WPE 5 0 0 Unknown No idea [T5973]
CSR 4 1990 2000 STA No idea [R66]
CSR 5 0 0 Unknown Poor [T3304] [R888]
CSR 6 2003 2012 DEC Reasonable [T6522] [R1381] [R1365]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 1994 1300
WPE 2 1997 1300
WPE 3 2002 1300
WPE 4 2006 1300
WPE 5 2012 1300
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.
  • R66 - BirdLife International Website 2002
  • 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  • R1365 - Wetlands International, International Waterbird Census, unpublished data, 2014.
  • 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

  • T5973 - Wetlands International 2012. Uncertain trend.
  • T3304 - 898. Uncertain trend.
  • S8526 - The current estimate of 130,000 individuals (Perennou, Mundkur, Scott, & Bureau, 1994) based on AWC counts of 50,000-93,600 with 1970 data. The count totals in 2002, 2003 and 2007 have exceeded this estimation, but mostly ranged between 36,827 (2006) and 78,114 individuals (2010). Rodman (2014) estimate that no more than a thousand birds occur in NE Africa, largely overlooked. Considering the large counts exceeding the estimate of Perennou et al. (1994), but also taking into account the observed decline and consequently lower imputed totals (which indicate an improved coverage of the suit of sites), the current size of the population is cautiously estimated to be 80,000-130,000 individuals
  • T6522 - Nagy et al. (2014). The trend is based on data from AZ and IR, where over 90% of the birds counted occur every year and a clear declining trend is visible across the suite of regularly counted sites in Iran (Wetlands International, 2014) and this is reflected in the trend long-term trend data. The trend for 2003-2012 can be heavily influenced by the peaks in 2003 and 2007. In 2003, there were unusually high counts across a suit of sites in Iran, while in 2008, 70,000 birds were reported from the Hoor-e Bamdej marshes.



Copyright Wetlands International 2012

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