Population information

Order name Charadriiformes
Family name Laridae
Scientific name Thalasseus bergii Common name Greater Crested Tern
Population name bergii, Southern Africa (Angola - Mozambique)
Breeding range Namibia to South Africa Non-breeding range Angola to S. Mozambique
Red List Category Least Concern
Ramsar regions Africa
Notes In WPE2 this population belonged to one single population (S Africa/Madagascar (breeding)).

Conservation Framework

Conservation framework Notes
AEWA
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 3 0 0 20,000 20,000 [R295]
WPE 4 0 0 20,000 20,000 [R295]
WPE 5 1994 1996 20,000 20,000 Expert opinion [R295]
CSR 4 1994 1996 20,000 20,000 Expert opinion [R295]
CSR 5 1994 1996 20,000 20,000 Expert opinion [R295]
CSR 6 1994 1996 15,000 25,000 Expert opinion [S8707] [R1371] [R317] [R196] [R1513]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1990 2000 STA [R196]
WPE 4 1990 2000 STA [R196]
WPE 5 1990 2000 STA? No idea [R196]
CSR 4 1990 2000 STA? Poor [R196]
CSR 5 1990 2000 STA? Poor [R196]
CSR 6 2003 2012 Unknown No idea

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 200
WPE 4 2006 200
WPE 5 2012 200
CSR 4 0 -1
CSR 5 0 -1

References

  • R295 - Harrison, J.A., Allan, D.G., Underhill, L.G., Herremans, M., Tree, A.J., Parker, V. and Brown, C.J. (1997). The Atlas of Southern African Birds. Vol.1. BirdLife South Africa, Johannesburg. 785 pp.
  • 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
  • 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/
  • R317 - Hockey P.A.R., Dean, W.R.J. and Ryan, P.G. (eds). 2005. Roberts - Birds of Southern Africa, 7th ed. The Trustees of the John Voelcker Bird Book Fund, Cape Town.
  • R1513 - Crawford (2003)
  • 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

  • S8707 - A range seems most appropriate, as breeding population is significantly related to food availability.



Copyright Wetlands International 2012

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