Population information

Order name Charadriiformes
Family name Laridae
Scientific name Hydroprogne caspia Common name Caspian Tern
Population name Southern Africa (bre)
Breeding range Southern Africa Non-breeding range
Red List Category Least Concern
Ramsar regions Africa
Notes Often assigned to monotypic genus Hydroprogne.

Conservation Framework

Conservation framework Notes
AEWA
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 4 1999 1999 2,000 2,000 [S2434] [R45]
WPE 3 0 0 1,500 1,500 [R145]
WPE 1 0 0 500 500 [R555]
WPE 2 0 0 1,500 1,500 [R144]
WPE 5 2004 2004 2,000 2,000 Expert opinion [R192] [R638]
CSR 5 2004 2004 2,000 2,000 Expert opinion [R192] [R638]
CSR 4 2004 2004 2,000 2,000 Expert opinion [R192] [R638]
CSR 6 2004 2004 1,200 1,300 Expert opinion [S8701] [R1501]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 4 0 0 STA [R573]
WPE 3 1990 2000 STA [R196]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 5 1997 2007 INC Reasonable [T4487] [R888]
CSR 5 1997 2007 INC Reasonable [T1584] [R888]
CSR 4 1990 2000 STA Poor
CSR 6 2003 2012 STA/DEC? Reasonable [T6719] [R1381]

Population 1% level

Publication Yearset 1 percent Note
WPE 4 2006 20
WPE 3 2002 15
WPE 1 1994 5
WPE 2 1997 15
WPE 5 2012 20
CSR 5 0 -1
CSR 4 0 -1

References

  • R45 - Barzen, J. and U.S. Seal (editors). 2000. Eastern Sarus Crane PHVA Final Report. CBSG, Apple Valley, MN, USA. unpublished papers from Jeb Barzen and Tran Triet.
  • R573 - Schricke, V. 2001. Elements for a garganey (Anas querquedula) management plan. Game and Wildlife Science, 18(1): 9-41.
  • R145 - Cooper, J., Williams, A.J. and Britton, P.L. 1984. Distribution, population sizes and conservation of breeding seabirds in the Afrotropical region. IUCN Technical Publication 2, 403-417.
  • R196 - du Toit, M., Boere, G.C., Cooper, J., Kemper, J., Lenten, B., Simmons, R.S., Whittington, P.A. and Byers, O. (eds). 2002. Conservation assessment and management plan for southern African coastal seabirds. Workshop Report, Cape Town, South Africa, 4-8 Feb
  • R555 - Rose, P.M. and Scott, D.A. 1994. Waterfowl Population Estimates. IWRB Publication 29. Slimbridge, UK.
  • R144 - Cooper, J., Brooke, R.K., Cyrus, D.P., Martin, A.P., Taylor, R.H. and Williams, A.J. 1992. Distribution, population size and conservation of the Caspian Tern Sterna caspia in southern Africa. Ostrich 63: 58-67.
  • R192 - Dodman, T., 2006. Status, estimates and trends of waterbird populations in Africa. Wetlands International, Dakar.
  • R638 - Tree, A.J.,. In litt. 2005.
  • 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
  • R1501 - Wanless et al. (in litt. 2014)
  • 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

  • S2434 - 500 breeding pairs in South Africa.
  • T4487 - Wetlands International 2012. Trend 1994-2007: +8.0% p.a. ? Increase.
  • T1584 - 898. Trend 1994-2007: +8.0% p.a. – Increase.
  • S8701 - 400-420 pairs in 2012 (Wanless et al. in litt. 2014). 310 in ZA, 15 in NA, 90 in AN.
  • T6719 - Expert opinion at the Benguela seabird action planning was that the population is stable. However, Nagy et al. (2014) showed large decrease in the short-term, which followed earlier increase.
  • S8980 - Although the population size was revised based on breeding numbers from Wanless et al. (2014) in CSR6, the IWC count totals in 2013 reached 1,962 individuals (Wetlands International 2017).
  • T7059 - Strong increase in the long--term.



Copyright Wetlands International 2012

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