<i>Ardetta maculata</i> (W. L. Buller) is a synonym of <i>Ardeola novaezelandeae</i> (A. C. Purdie) which is identical with the New Zealand Little Bittern (<i>Ixobrychus novaezelandeae</i>)
Walter Lawry Buller (1838–1906) (Author); John Gerrard Keulemans (1842–1912) (Illustrator)
1888
Walter Lawry Buller: Notes on the Little Bittern of New Zealand (<i>Ardetta maculata</i>). In: A History of the Birds of New Zealand