Population information

Order name Charadriiformes
Family name Scolopacidae
Scientific name Calidris canutus Common name Red Knot
Population name islandica, NE Canada & Greenland/Western Europe
Breeding range Islands of High Arctic Canada, Greenland Non-breeding range W Europe, mainly Wadden Sea, Britain, Ireland
Red List Category Near Threatened
Ramsar regions Europe North America
Notes

Conservation Framework

Conservation framework Notes
AEWA
EUBD
WHSRN
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 1 0 0 345,000 345,000 [R170]
WPE 2 0 0 345,000 345,000 [R170]
WPE 3 1990 2000 450,000 450,000 [R611]
WPE 4 1990 2000 450,000 450,000 [R611]
WPE 5 2009 2009 450,000 450,000 Expert opinion [R860]
CSR 4 1993 1997 450,000 450,000 Expert opinion
CSR 5 2009 2009 450,000 450,000 Expert opinion [R860]
CSR 6 2000 2012 500,000 565,000 Expert opinion [S8337] [R1362] [R1326] [R1451]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 1982 1992 STA [R170]
WPE 2 1982 1992 STA [R170]
WPE 3 1984 1997 DEC [R611]
WPE 4 1984 1997 DEC [R611]
WPE 5 1997 2007 FLU Good [T4190] [R888] [R898] [R899]
CSR 4 2004 2004 DEC Good
CSR 5 1997 2007 FLU Good [T844] [R888] [R898] [R899]
CSR 6 2003 2014 STA/DEC? Reasonable [T6337] [R1381] [R1362] [R1546]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 1994 3500
WPE 2 1997 3500
WPE 3 2002 4500
WPE 4 2006 4500
WPE 5 2012 4500
CSR 4 0 -1
CSR 5 0 -1
CSR 6 0 -1

References

  • R170 - Davidson, N.C. and Piersma, T. (eds.). 1992. The migration of Knots. Wader Study Group Bulletin 68. Special Issue.
  • R611 - Stroud, D.A., Davidson, N.C., West, R., Scott, D.A., Haanstra, L., Thorup, O., Ganter, B. and Delany, S. (compilers) on behalf of the International Wader Study Group 2002. Status of migratory wader populations in Africa and Western Eurasia in the 1990s.
  • R860 - Delany, S., Scott, D., Dodman, T. and Stroud, D. 2009. An Atlas of Wader Populations in Africa and Western Eurasia. Wetlands International, Wageningen, The Netherlands.
  • 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
  • R898 - Thaxter, C.B., Sansom, A. Thewlis, R.M., Calbrade, N.A, Ross-Smith, V.H., Bailey, S., Mellan, H.J. and Austin, G.E. (2010). Wetland Bird Survey Alerts 2006/2007: Changes in numbers of wintering waterbirds in the Constituent Countries of the United Kingdom, Special Protection Areas (SPAs) and Sites of Special Scientific Interest (SSSIs). BTO Research Report 556. BTO, Thetford.
  • R899 - Hornman M., Hustings F., Koffijberg K., van Winden E., SOVON Ganzen- en Zwanenwerkgroep and Soldaat L. 2011. Watervogels in Nederland in 2008/2009. SOVON-monitoringrapport 2011/03, Waterdienst-rapport BM 10.24. SOVON Vogelonderzoek Nederland, Nijmegen.
  • R1362 - European Topic Centre on Biological Diversity (in prep) Population and trend data provided by the EU Member States in the frame of their reporting under Article 12 of the EU Birds Directive. Online fact sheets. European Topic Centre on Biological Diversity, Paris. URL: http://bd.eionet.europa.eu/activities/Reporting/Article_12/Reports_2013/Member_State_Deliveries. Accessed on 31 July 2014.
  • R1326 - Musgrove, A. J., Austin, G. E., Hearn, R. D., Holt, C. A., Stroud, D. A., & Wotton, S. R. (2011). Overwinter population estimates of British waterbirds. British Birds, 104(7), 364.
  • R1451 - Stroud, D. A. (2004). Status of migratory wader populations in Africa and Western Eurasia in the 1990s. International Wader Study Group.
  • 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.
  • R1546 - van Roomen M., Nagy S., Foppen R., Dodman T., Citegetse G. & Ndiaye A. (in prep). Status of coastal waterbird populations in the East Atlantic Flyway. Programme Rich Wadden Sea, Leeuwarden, The Netherlands, Sovon, Nijmegen, The Netherlands, Wetlands International, Wageningen, The Netherlands, BirdLife International, Cambridge, United Kingdom &, Wadden Sea Secretariat, Wilhelmshaven, Germany.
  • 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
  • R1552 - van Roomen M., Nagy S., Foppen R., Dodman T., Citegetse G. & Ndiaye A. 2015. Status of coastal waterbird populations in the East Atlantic Flyway. With special attention to flyway populations making use of the Wadden Sea. Programme Rich Wadden Sea, Leeuwarden, The Netherlands, Sovon, Nijmegen, The Netherlands, Wetlands International, Wageningen, The Netherlands, BirdLife International, Cambridge, United Kingdom &, Common Wadden Sea Secretariat, Wilhelmshaven, Germany. URL: http://www.waddensea-secretariat.org/sites/default/files/downloads/status_coastal_birds_eaf_2014_1.pdf

Notes

  • T4190 - Hornman et al. 2011: Fluctuating in The Netherlands, small increase over the last 10 seasons prior to 2008-9. Thaxter et al. 2010: Fluctuating. in the UK; Overall 7% increase over the 10 seasons prior to 2006-7. Wetlands International 2012: Trend 1983-200
  • T844 - 909. Fluctuating, small increase over the last 10 seasons prior to 2008/9. 908: Fluctuating. Overall 7% increase over the last 10 seasons prior to 2006/7. 898: Trend 1983-2007: +1.5% p.a. – Increase. However, strong fluctuations from the 1990s.
  • S8337 - The total of the national wintering population estimates from IE, UK, PT, ES, FR, BE, NL, DE and DK is 504,907-564,915 individuals (European Topic Centre on Biological Diversity, in prep.), which is some 54,000 higher than the previous estimate of Stroud (2004) based on data from the 1990s. The bulk of the difference is caused by higher estimates for the UK by Musgrove et al. (2011) who estimated the numbers of Red Knots in the UK to be 330,000 individuals instead of 292,000 used by Stroud (2004) and higher - on average 37,000 individuals - estimates for DE in the first half of the 2000s.
  • T6337 - Trend analysis based on the IWC data indicates moderate decrease between 2003 and 2012 (Nagy et al., 2014). However, the long-term trend is fluctuating. This does not agree with the overall trend derived from national trend estimates (European Topic Center on Biological Diversity, in prep.), which suggests strong increase (1.4-2.95% p.a.) in the short-term (2000-2012) and moderate increase (0.29-0.56%) in the long-term (1980-2012). The numbers are reported to increase in the UK, IE, ES, FR and DE, stable in PT, fluctuating in the NL, DK and unknown in BE, but these data are partly outdated and include a period of increase. Using different trend analysis method on the IWC data, van Roomen et al. (in prep) found stable/fluctuating trend both in the short- and in the long-term.



Copyright Wetlands International 2012

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