Plate VII : Circus Gouldi labeled diagram. "Outline of New-Zealand Harrier (<i><a href="//commons.wikimedia.org/w/index.php?title=Circus_gouldi&amp;action=edit&amp;redlink=1" class="new" title="Circus gouldi (page does not exist)">Circus gouldi</a></i>)".  Also in <a rel="nofollow" class="external text" href="http://www.nzetc.org/tm/scholarly/tei-BulBird-t1-g1-t1-front-d6-d5.html#BulBird-fig-Bul01Birdlxa"><i>A History of the Birds of New Zealand</i></a>
By Walter L. Buller
Published 1874
Transactions and Proceedings of the Royal Society of New Zealand, Volume 7, 1874. Article XXII — "On the Ornithology of New Zealand".