Population information

Order name Charadriiformes
Family name Laridae
Scientific name Gelochelidon nilotica Common name Common Gull-billed Tern
Population name nilotica, Western Europe/West Africa
Breeding range W & SW Europe, NW & W Africa S to Mauritania Non-breeding range Mauritania E to Nigeria & Chad
Red List Category Least Concern
Ramsar regions Africa Europe
Notes Often placed in monotypic genus Gelochelidon.

Conservation Framework

Conservation framework Notes
AEWA
EUBD
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 3 1970 1990 10,000 16,000 No quality assessment [R69]
WPE 1 1994 1994 12,000 12,000 No quality assessment [R70]
WPE 2 1994 1994 12,000 12,000 No quality assessment [R70]
WPE 4 1990 2000 14,000 21,000 No quality assessment [S2407] [R63]
WPE 5 2001 2001 14,000 21,000 Expert opinion [R63] [R190]
AEWA CSR 4 2001 2001 14,000 21,000 Expert opinion [R63] [R190]
AEWA CSR 5 2001 2001 14,000 21,000 Expert opinion [R63] [R190]
AEWA CSR 6 2002 2012 37,000 63,000 Expert opinion [S8427] [R1362] [R1361] [R1371]
AEWA CSR 7 2002 2012 37,000 63,000 Expert opinion [S8978] [R1549] [R1371]
AEWA CSR 8 1972 2018 28,000 38,000 Expert opinion [S9498] [R1625] [R1630] [R1371] [R1619] [R1552]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1970 1990 DEC No quality assessment [R69]
WPE 1 1983 1993 DEC No quality assessment [R70]
WPE 2 1983 1993 DEC No quality assessment [R70]
WPE 4 1990 2000 STA No quality assessment [R63]
WPE 5 1990 2000 STA Poor [R63]
AEWA CSR 4 1990 2000 STA Poor [R63]
AEWA CSR 5 1990 2000 STA Poor [R63]
AEWA CSR 6 2000 2012 INC Reasonable [T6426] [R1362] [R1361]
AEWA CSR 7 2000 2012 STA/FLU Reasonable [T7056] [R1549]
AEWA CSR 8 2000 2012 INC Reasonable [T7643] [R1625] [R1630] [R1620]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 130
WPE 1 1994 120
WPE 2 1994 120
WPE 4 2006 180
WPE 5 2012 170
AEWA CSR 4 -1 -1 Not Set
AEWA CSR 5 -1 -1 Not Set
AEWA CSR 6 -1 -1 Not Set
AEWA CSR 7 2018 480
AEWA CSR 8 2018 480

References

  • R69 - BirdLife International/European Bird Census Council. 2000. European bird populations: estimates and trends. Cambridge, UK. BirdLife International Conservation Series No. 10.
  • R70 - BirdLife International/European Birds Census Council, European Birds Database. Accessed March 1994.
  • R63 - BirdLife International (2004)b. Birds in Europe, population estimates, trends and conservation status. Cambridge, UK: BirdLife International. (BirdLife Conservation Series No. 12).
  • R190 - Dodman, T. 2002. Waterbird Population Estimates in Africa. Unpublished report to Wetlands International.
  • 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.
  • R1361 - BirdLife International, BTO, EBCC, CSO, IUCN, RSPB, SOVON, Wetlands International (in prep) Population and trend data provided to the European Red List of Birds Project funded by the European Commission. Digital dataset. BirdLife International, Cambridge, UK. Accessed on 31 July 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/
  • R1549 - BirdLife International 2015. European Red List of Birds. Luxembourg: Office for Official Publications of the European Communities. http://datazone.birdlife.org/info/euroredlist
  • R1625 - BirdLife International (in prep) European Red List of Birds. Deliverable to the European Commission (DG Environment) in 2021 under Service Contract ENV.D.3/SER/2018/0018.
  • R1630 - Amhaouch, Z., Qninb, A., Mesbach, H., Noaman, M. (2020). Rapport sur le statut de la population des espèces d’oiseaud’eau (indigènes et) non indigènes inscrites Ă  l’AEWA dansla zone de l’Accord pour la pĂ©riode 2013-2018: Royuame du Maroc.
  • R1619 - Nagy, S. & Langendoen, T. (2020) Flyway trend analyses based on data from the African-Eurasian Waterbird Census from the period of 1967-2018. Online publication. Wetlands International, Wageningen, The Netherlands. URL: http://iwc.test.wetlands.org/index.php/aewatrends8
  • 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
  • R1620 - van Roomen, M., Nagy, S., Citegetse, G., & Schekkerman, H. (2018). East Atlantic Flyway Assessment 2017: the status of coastal waterbird populations and their sites. Wadden Sea Flyway Initiative p/a CWSS, Wetlands International, BirdLife International, Wilhelmshaven, Wageningen and Cambridge. Retrieved from: https://www.waddensea-worldheritage.org/resources/east-atlantic-flyway-assessment-2017

Notes

  • S2407 - Summed breeding populations of relevant European countries 3,752 - 4,369 pairs (11,256 - 13,107 individuals) (BirdLife International (2004b)). Dodman (2002) calculates African total of 3,135-7,485 individuals. Overall total 14,391 - 20,592.
  • S8427 - 7,852-8,876 pairs in DK, DE, FR, ES, PT and IT (European Topic Centre on Biological Diversity, in prep., BirdLife International et al., in prep.). According to Dodman (2014) 4500-12,000 pairs in NW and W Africa.
  • T6426 - 2000-2012:1.0107-1.0110, 1980-2012: 1.0005-1.0050 (European Topic Centre on Biological Diversity, in prep., BirdLife International et al., in prep.).Increased in all West Mediterranean EU Member States except IT where trend is unknown. Declined in DK and fluctuated in DE.
  • S8978 - 7,852-8,876 pairs in Europe (BirdLife International 2015). According to Dodman (2014) 4500-12,000 pairs in NW and W Africa.
  • T7056 - Stable/fluctuating both in the short- and the long-term.
  • S9498 - The size of the breeding population is estimated at 9,357-12,541 pairs, or 28,000-38,000 individuals after rounding in DE, DK, ES, FR, IT, PT (BirdLife International, in prep.), MA (Amhaouch et al., 2020), LY, TN, DZ, MR, SN (Dodman, 2014) based on data from the period of 1972-2018. The highest annual IWC count total between 2014–2018 was 22,682 individuals in 2014 (Nagy & Langendoen, 2020). However, van Roomen et al. (2015) accounted for 33,000 individuals based on the January counts in 2010-2014.
  • T7643 - It is estimated that the breeding population has increased by 63% in DE, FR (BirdLife International, in prep.) and MA (Amhaouch et al., 2020) between 2009 and 2018. No quantitative trend information is available from DK, ES, IT, PT, LY, TN, DZ, MR, SN. Based on BirdLife International (in prep.), it is estimated that the breeding population has increased by 150-510% in DE, DK, FR, IT between 1980 and 2018. No quantitative trend information is available from ES, PT, MA, LY, TN, DZ, MR, SN. Based on IWC data, van Roomen et al. (2018) reported moderate increase for 1980-2012 (1.03) and for 2000-2012 (1.02).



Copyright Wetlands International 2012

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