Population information

Order name Charadriiformes
Family name Laridae
Scientific name Gelochelidon nilotica Common name Common Gull-billed Tern
Population name nilotica, Black Sea & East Mediterranean/Eastern Africa
Breeding range Black Sea, E Mediterranean Non-breeding range Sudan S to Botswana
Red List Category Least Concern
Ramsar regions Africa Europe
Notes

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 14,000 39,000 No quality assessment [R69]
WPE 4 1990 2000 24,000 52,000 No quality assessment [S2411] [R63]
WPE 1 1994 1994 15,000 25,000 No quality assessment [R70]
WPE 2 1994 1994 15,000 25,000 No quality assessment [R70]
WPE 5 1990 2000 24,000 52,000 Expert opinion [R63]
AEWA CSR 4 1990 2000 24,000 52,000 Expert opinion [R63]
AEWA CSR 5 1990 2000 24,000 52,000 Expert opinion [R63]
AEWA CSR 6 1990 2013 24,000 52,000 Expert opinion [S8428] [R1362] [R63]
AEWA CSR 7 1998 2013 26,000 37,000 Expert opinion [S8979] [R1549]
AEWA CSR 8 2007 2019 15,000 20,000 Expert opinion [S9499] [R1625] [R1549] [R1677] [R1622] [R1670] [R1619]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1970 1990 DEC No quality assessment [R69]
WPE 4 1990 2000 DEC No quality assessment [R63]
WPE 1 0 0 Unknown No quality assessment
WPE 2 0 0 Unknown No quality assessment
WPE 5 1990 2000 DEC Poor [R63]
AEWA CSR 4 1990 2000 DEC Poor [R63]
AEWA CSR 5 1990 2000 DEC Poor [R63]
AEWA CSR 6 2000 2012 Unknown Poor [T6427] [R63] [R1361]
AEWA CSR 7 2000 2012 DEC Reasonable [T7057] [R1549]
AEWA CSR 8 2009 2018 DEC Reasonable [T7690] [R1625]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 270
WPE 4 2006 380
WPE 1 1994 200
WPE 2 1994 200
WPE 5 2012 350
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 310
AEWA CSR 8 2018 310

References

  • R69 - BirdLife International/European Bird Census Council. 2000. European bird populations: estimates and trends. Cambridge, UK. BirdLife International Conservation Series No. 10.
  • R63 - BirdLife International (2004)b. Birds in Europe, population estimates, trends and conservation status. Cambridge, UK: BirdLife International. (BirdLife Conservation Series No. 12).
  • R70 - BirdLife International/European Birds Census Council, European Birds Database. Accessed March 1994.
  • 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.
  • 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.
  • R1677 - Hamada, A. Mossad, H.I. (2020). Reports on the population status of AEWA-listed (native) and non-native waterbird species in the Agreement area for the period 2013-2018: Egypt.
  • R1622 - Leguma, E.O., John, J., Nkwabi, A., Mgimwa, E.F. & Kaita, M. (2020). Reports on the population status of AEWA-listed (native) and non-native waterbird species in the Agreement area for the period 2013-2018: United Republic of Tanzania.
  • R1670 - Akankwasah, B., Mugabe, M, Candia, L & Byaruhanga, A. (2020) Reports on the population status of AEWA-listed (native) and non-native waterbird species in the Agreement area for the period 2013-2018: Uganda
  • 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

Notes

  • S2411 - BirdLife International (2004b): Summed breeding populations of relevant countries 8,085 - 17,255 pairs (24,255 - 51,765 individuals).
  • S8428 - New data only available from BG and RO: 7-18 pairs (European Topic Centre on Biological Diversity, in prep.). Further 8,001-17,010 pairs (BirdLife International, 2004).
  • T6427 - Its population fluctuated in RU, declined between 1990 and 2000 in AL, GR, TR, UA and RO (BirdLife International 2004). Current trend is unknown in RO (BirdLife International et al., in prep.).
  • S8979 - 8,725-12,336 pairs. (All birds from RU allocated to this population).
  • T7057 - Significant long-term decline.
  • S9499 - The size of the breeding population is estimated at 5,118-6,539 pairs, or 15,000-20,000 individuals after rounding in AL, BG, GR, RO, RU, TR, UA based on data from the period of 2007-2019 (BirdLife International, in prep.). The size of the breeding population is now estimated almost a magnitude smaller than it was in BirdLife International (2015). The size of the wintering population is estimated size at 17,000-31,000 individuals based on data only from EG (Hamada & Mossad, 2020), TZ (Leguma et al, 2020), UG (Akankwasah, et al., 2020) based on data from the period of 2013-2018. However, numbers for UG might be underestimated because 8.889 individuals were counted in January 2016 and 5,256 in 2006. The highest annual IWC count total between 2014–2018 was 9,883 individuals in 2016 (Nagy & Langendoen, 2020).
  • T7690 - Based on BirdLife International (in prep.), it is estimated that the breeding population has changed by -27-1% in GR, RO, AL between 2009 and 2018 and has decreased by 10-53% in GR, RO, AL between 1980 and 2018. No quantitative trend information is available from BG, RU, TR, UA.



Copyright Wetlands International 2012

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