Population information

Nom ordre Charadriiformes
Nom famille Laridae
Nom scientifique Thalasseus bergii Nom courant Greater Crested Tern
Nom population thalassinus, Eastern Africa & Seychelles
Aire de reproduction Tanzania, Seychelles, Chagos Aire de non-reproduction
Catégorie de la Liste Rouge Least Concern
Regions Ramsar Africa Asia
Notes In CSR6 it was proposed to combine this population with the Madagascar & Mozambique/Southern Africa population. However, the population is treated separately until further evidence is available to confirm the degree of exchange of individuals among colonies.

Réseau de conservation

Réseau de conservation Notes
AEWA
Note:

Taille de population

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 1 0 0 1,200 1,200 No quality assessment [R670]
WPE 2 0 0 1,200 1,200 No quality assessment [R670]
WPE 3 2001 2001 1,300 1,700 No quality assessment [R190]
WPE 4 2001 2001 1,300 1,700 No quality assessment [R190]
WPE 5 2001 2001 1,300 1,700 Expert opinion [R190]
AEWA CSR 4 2001 2001 1,300 1,700 Expert opinion [R190]
AEWA CSR 5 2001 2001 1,300 1,700 Expert opinion [R190]
AEWA CSR 6 2001 2001 1,300 1,700 Expert opinion [R190]
AEWA CSR 7 2001 2001 1,300 1,700 Expert opinion [R190]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 0 0 Unknown No quality assessment
WPE 2 0 0 Unknown No quality assessment
WPE 3 0 0 Unknown No quality assessment
WPE 4 0 0 Unknown No quality assessment
WPE 5 0 0 Unknown No quality assessment
AEWA CSR 4 0 0 Unknown No quality assessment
AEWA CSR 5 0 0 Unknown No quality assessment
AEWA CSR 6 0 0 Unknown No idea
AEWA CSR 7 1995 2015 STA/FLU Poor [R1548]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 1994 12
WPE 2 1997 12
WPE 3 2002 15
WPE 4 2006 15
WPE 5 2012 15
AEWA CSR 4 -1 -1 Not Set
AEWA CSR 5 -1 -1 Not Set
AEWA CSR 7 2018 15

References

  • R670 - Urban, E.K., Fry, C.H. and Keith, S. 1986. The Birds of Africa. Volume II. Academic Press, London and Orlando.
  • R190 - Dodman, T. 2002. Waterbird Population Estimates in Africa. Unpublished report to Wetlands International.
  • 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. URL: http://iwc.wetlands.org/index.php/aewatrends

Notes




Copyright Wetlands International 2012

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