The island is home to unique and endangered flora such as Brachychiton incanus and a variety of birdlife such as Rufous Night Heron, Little Eagle, Brown Falcon, Whimbrel, Tawny Frogmouth, Great Bowerbird and Rainbow Bee-eater.
(The only other Australasian raptors to hover are the elanid kites which are much lighter in colour and a little larger, and the Brown Falcon, which is much larger and more heavily built, and hovers only with difficulty).
Ornithologists variously described the New Zealand Falcon as an aberrant hobby or as allied to three South American species (F. deiroleucus, F. rufigularis and F. femoralis); however studies of feather proteins suggest a close tie with the Australian Brown Falcon.
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