Population information

Order name Charadriiformes
Family name Laridae
Scientific name Onychoprion anaethetus Common name Bridled Tern
Population name antarcticus, W Indian Ocean
Breeding range Sri Lanka, Maldives, Seychelles, Madagascar, Kenya & S. Somali coast Non-breeding range Tropical Indian Ocean
Red List Category Least Concern
Ramsar regions Africa Asia
Notes

Conservation Framework

Conservation framework Notes
AEWA
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 1 0 0 500,000 500,000 [R165]
WPE 2 0 0 500,000 500,000 [R165]
WPE 3 0 0 500,000 500,000 [R165]
WPE 4 0 0 500,000 500,000 [R165]
WPE 5 2000 2010 18,000 18,000 Expert opinion [R827] [R828] [R834] [R837] [R848] [R851] [R855]
CSR 4 2001 2001 10,000 15,000 Expert opinion [S2711]
CSR 5 2000 2010 18,000 18,000 Expert opinion [R827] [R828] [R834] [R837] [R848] [R851] [R855]
CSR 6 2003 2011 19,300 19,300 Expert opinion [R1343]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 0 0 Unknown
WPE 4 0 0 Unknown
WPE 5 1990 2000 Unknown No idea [R66]
CSR 4 0 0 Unknown
CSR 5 0 0 Unknown
CSR 6 1990 2011 STA Poor [R1343]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 1994 5000
WPE 2 1997 5000
WPE 3 2002 5000
WPE 4 2006 5000
WPE 5 2012 180
CSR 4 0 -1
CSR 5 0 -1
CSR 6 0 -1

References

  • R165 - Croxall, J.P., Evans, P.G.H. and Schreiber, R.W. (eds.). 1984. Status and Conservation of the World's Seabirds. ICBP Technical Publication No. 2. Cambridge, UK.
  • R827 - Jolliffe K 2010a. Cousine Island Annual Seabird Report 2010. Cousine Island Internal Report
  • R828 - Jolliffe K 2010b. Seabird news from Cousine. Seychelles Seabird Newsletter 6: 7.
  • R834 - Bristol R 2003. Census of bridled terns Sterna anaethetus on R?cif Island, February 2003. Nature Seychelles Unpublished Report, Seychelles.
  • R837 - Ledlie M and Derand GD 2010. Seabird news from Cousin. Seychelles Seabird Newsletter 6: 2-3.
  • R848 - Sutcliffe R, Mills S and Yeandle M. 2010. Aride Island Nature Reserve Annual Report 2009. Island Conservation Society Internal Report.
  • R851 - ZICOMA (Zone importante pour la conservation des oiseaux a Madagascar) 2001. Madagascar. In: Fishpool L and Evans MI (Eds). Important bird areas in Africa and associated islands: priority sites for conservation. Newbury and Cambridge, UK: Pisces Publications and BirdLife International. pp. 489?537.
  • R855 - Ecomar ? unpublished. Synthesis made by Ecomar-University of R?union Island
  • R66 - BirdLife International Website 2002
  • R1343 - Angel, A. & Wanless, R.M. 2014 Report on numbers, trends and conservation status of tropical seabird species included in the Agreement. Project report to Wetlands International.

Notes

  • S2711 - Around 3,600 breeding pairs, but some information gaps.



Copyright Wetlands International 2012

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