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Alternative name: Australian Bittern
- Ixobrychus dubius
South-western and eastern Australia and New Guinea
This is a monotypic species.
It was formerly considered conspecific with Little Bittern or alternatively with the extinct New Zealand Bittern.
- Clements, JF. 2010. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2010. Ithaca: Cornell Univ. Press. ISBN 978-0801445019. Spreadsheet available at http://www.birds.cornell.edu/clementschecklist/Clements%206.5.xls/view
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