The Swamp Harrier, Circus approximans, also known as the Marsh Harrier, Australasian Harrier, KÄÂhu, Swamp-hawk or New Zealand Hawk is a large, slim bird of prey in the family Accipitridae.
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Source:
BirdLife International (2011) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 31/07/2011.