Population information

Order name Charadriiformes
Family name Laridae
Scientific name Chlidonias hybrida Common name Whiskered Tern
Population name javanicus (fluviatilis)
Breeding range Australia Non-breeding range Australia, New Guinea, Moluccas
Red List Category Least Concern
Ramsar regions Asia Oceania
Notes Higgins & Davies (1996) and others recognise javanica as the form breeding in Australia, and consider Asian populations to be nominate hybrida. Fluviatilis (Australia) is synonymized with javanicus.

Conservation Framework

Conservation framework Notes
EAAF Partnership
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 4 2003 2003 100,000 1,000,000 [S2765] [R341]
WPE 1 1987 1991 100,000 1,000,000 [R519]
WPE 2 1987 1991 100,000 1,000,000 [R519]
WPE 3 1987 1991 100,000 1,000,000 [R519]
WPE 5 1993 2004 100,000 1,000,000 Best guess [S7436] [R341] [R519] [R1085]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 4 1990 2000 FLU [R341]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 0 0 Unknown
WPE 5 1982 2011 FLU Poor [T5146] [R1126] [R341]

Population 1% level

Publication Yearset 1 percent Note
WPE 4 2006 10000
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 10000
WPE 5 2012 10000

References

  • R341 - Jaensch, Roger, August 2005. Detailed data and notes on numbers and distribution of waterbirds in Australia, updated from Jaensch, 2003, and derived from more than 90 Australian sources including Wetlands International, Birds Australia and Jaensch, 2003,
  • R519 - Perennou, C.P., Mundkur, T. and Scott, D.A. 1994. The Asian Waterfowl Census 1987-1991: distribution and status of Asian waterfowl. IWRB Spec. Publ. No. 24; AWB Spec. Publ. No. 86. Slimbridge, UK and Kuala Lumpur, Malaysia.
  • R1085 - Halse, S.A., Pearson, G.B., Hassell, C., Collins, P., Scanlon, M.D. and Minton, C.D.T. 2005. Mandora Marsh, north-western Australia, an arid-zone wetland maintaining continental populations of waterbirds. Emu 105: 115?125.
  • R1126 - Minton, C.D.T. In litt. 19, 23 and 27 April 2012 (Victorian Wader Study Group).

Notes

  • S2765 - 344: "at least several hundred thousand" in Australia, where population fluctuates due to dependence on highly variable inland breeding areas.
  • S7436 - Estimate based on combined peak counts from breeding habitat after sub-regional flood events; low reliability, numbers possibly lower during prolonged drought.
  • T5146 - Numbers fluctuate with rainfall.



Copyright Wetlands International 2012

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