Population information

Order name Charadriiformes
Family name Laridae
Scientific name Larus cirrocephalus Common name Grey-headed Gull
Population name poiocephalus, West Africa
Breeding range W coast and rivers of West 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 -1 -1
WPE 2 0 0 -1 -1
WPE 3 0 0 30,000 30,000 [R362]
WPE 4 0 0 30,000 30,000 [R362]
WPE 5 2000 2000 30,000 30,000 Expert opinion [R362]
CSR 4 2000 2000 30,000 30,000 Expert opinion [R362]
CSR 5 2000 2000 30,000 30,000 Expert opinion [R362]
CSR 6 2010 2014 25,000 30,000 Census based [S8594] [R1359]

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 1990 2000 STA No idea [R66]
CSR 4 1990 2000 STA No idea [R66]
CSR 5 1990 2000 STA No idea [R66]
CSR 6 2003 2014 DEC? Reasonable [T6587] [R1359]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 300
WPE 4 2006 300
WPE 5 2012 300
CSR 4 0 -1
CSR 5 0 -1
CSR 6 0 -1

References

  • R362 - Keijl, G.O., Brenninkmeijer, A., Schepers, F.J., Stienen, E.W.M., Veen, J. and Ndiaye, A. 2001. Breeding Gulls and terns in Senegal in 1998 and proposal for new population estimates of gulls and terns in west Africa. Atlantic Seabirds 3 (2) 59-74.
  • R66 - BirdLife International Website 2002
  • R1359 - van Roomen, M., van Winden, E. & Langendoen, T. 2014. The assessment of trends and population sizes of a selection of waterbird species and populations from the coastal East Atlantic Flyway for Conservation Status Report 6 of The African Eurasian Waterbird Agreement. Wadden Sea Flyway Initiative, Wetlands International & Birdlife International.
  • 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
  • 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

  • S8594 - 23,,428 individuals counted in January. Rounded and raised to an estimate of 25,000 - 30,000.
  • T6587 - unclear trend on the basis of trend analyses with tendency to decrease which is confirmed by a small decrease in estimated population size population estimates stable numbers
  • T7160 - unclear trend on the basis of trend analyses with tendency to decrease which is confirmed by a small decrease in estimated population size population estimates stable numbers (van Roomen et al. 2015). Wetlands International (2017) has found uncertain strong increase in the long-term which apparently slowed down in the short one.



Copyright Wetlands International 2012

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