Population information

Order name Ciconiiformes
Family name Threskiornithidae
Scientific name Threskiornis moluccus Common name Australian Ibis
Population name (strictipennis)
Breeding range Australia (not Tasmania), S New Guinea Non-breeding range
Red List Category Least Concern
Ramsar regions Oceania
Notes Recognised by Peters (1931). Often included in nominate (molucca). In WPE2 this population belonged to one single population T.m. molucca Aust/New Guinea/Indonesia.

Conservation Framework

Conservation framework Notes
EAAF Partnership

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 4 2003 2003 100,000 1,000,000 [S4354] [R341]
WPE 3 0 0 1 70,000 [R313]
WPE 5 1995 2009 25,000 1,000,000 Best guess [S6475] [R286] [R341] [R1027] [R1149]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 4 1990 2000 FLU [R341]
WPE 3 0 0 Unknown
WPE 5 1982 2011 FLU Poor [T5762] [R1101]

Population 1% level

Publication Yearset 1 percent Note
WPE 4 2006 10000
WPE 3 2002 700
WPE 5 2012 10000


  • 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,
  • R313 - Marchant, S.M. and Higgins, P.J. 1993. Handbook of Australian, New Zealand and Antarctic Birds. Volume 2: Raptors to Lapwings. Oxford University Press, Melbourne, Australia.
  • R286 - Halse, S.A., Pearson, G.B., Jaensch, R.P., Kulmoi, P., Gregory, P., Kay, W.R. and Storey, A.W. 1996. Waterbird surveys of the Middle Fly River floodplain, Papua New Guinea. Wildlife Research 23 (5): 557-569. (CSIRO Publishing, Australia).
  • R1027 - Bishop, K.D. 2003. A Review of the Avifauna of the TransFly Eco-region: the status, distribution, habitats and conservation of the region?s birds. Report to WWF South Pacific Program.
  • R1149 - Reid, J.R.W., Kingsford, R.T. and Jaensch, R.P. 2009. Waterbird Surveys in the Channel Country Floodplain Wetlands, Autumn 2009. Report by Australian National University, Canberra, University of New South Wales, Sydney, and Wetlands International, Oceania, Brisbane, for the Australian Government Department of Environment, Water, Heritage and the Arts. 81 pp. Also available online at http://www.lebmf.gov.au/publications/pubs/waterbirds-report.pdf
  • R1101 - Jaensch, R. April 2012. Detailed data and notes on numbers and trends of waterbirds in Australia and other parts of the Oceania region, in a spreadsheet prepared for Wetlands International - Oceania for the 5th edition of WPE.


  • S4354 - 289:Large numbers [30,000 - 50,000] estimated southern New Guinea but not known if were migrants from Australia
  • S6475 - Data are inadequate for a numerical estimate, with many birds occurring outside areas surveyed, in non-wetland habitat. Net effect of declines inland and increases in urban areas is not yet clear.
  • T5762 - Inland populations declining, urban populations increasing.

Copyright Wetlands International 2012

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