Population information

Order name Ciconiiformes
Family name Ardeidae
Scientific name Botaurus poiciloptilus Common name Australasian Bittern
Population name New Zealand
Breeding range New Zealand Non-breeding range
Red List Category Endangered
Ramsar regions Oceania
Notes This species was included as one population in the first edition and has now been divided into 4 smaller populations. (WPE2)

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 3 1999 1999 1 725 [R68]
WPE 4 2005 2005 1 725 [S4102] [R64]
WPE 1 0 0 -1 -1
WPE 2 1993 1993 1 725 [R138]
WPE 5 2011 2011 1,000 1,500 Expert opinion [S7827] [R1139]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1990 2000 DEC [R68]
WPE 4 1995 2005 DEC [R64]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 5 2001 2010 DEC? No idea [T5470] [R1139]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 7
WPE 4 2006 7
WPE 1 0 -1
WPE 2 1997 7
WPE 5 2012 10

References

  • R68 - BirdLife International. (2000). Threatened Birds of the World. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife international
  • R64 - BirdLife International. 2005. Threatened birds of the world 2005. Species factsheets available at?www.birdlife.org
  • R138 - Collar, N.J., Crosby, M.J. and Stattersfield, A.J. 1994. Birds to Watch 2. The World List of Threatened Birds. BirdLife Conservation series No. 4. BirdLife International, Cambridge, UK. 407 pp.
  • R1139 - O'Donnell, C. In litt. 30 March 2012 (advice from Department of Conservation, New Zealand).

Notes

  • S4102 - 65 estimates 580-725 in 1980, possibly many more.
  • S7827 - Estimate reflects better information arising from systematic investigation.
  • T5470 - Trend assumed to be unchanged but requires confirmation.



Copyright Wetlands International 2012

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