This species may be confused with the Bat Falcon (F. rufigularis) and the Orange-breasted Falcon (F. deiroleucus), which have similar white-black-rust patterns below, but those species are built more like Peregrine Falcons and have solidly blackish heads and darker rufous bellies.
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--See the decent RangeMap/maps,etc at: "www.natureserve.org"-"Permanent Resident",mostly--> It was long known as Falco fusco-coerulescens or Falco fuscocaerulescens, but these names are now believed to refer to the Bat Falcon (F. rufigularis).
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Two other Falco species of the Americas, Merlin (F. columbarius) and American Kestrel (F. sparverius), seem to be closer to the Aplomado group than most other falcons, but the relationships of all these lineages are fairly enigmatic.
It was long known as Falco albigularis; the name Falco fusco-coerulescens or Falco fuscocaerulescens, long used for the Aplomado Falcon, are now believed to refer to the present species.
These two, in turn, are probably closest to the Aplomado Falcon and constitute a rather old American lineage of Falcos.
Peregrine Falcon | Robert Falcon Scott | Falcon Crest | General Dynamics F-16 Fighting Falcon | Falcon | Rolls-Royce Falcon | Ford Falcon | Falcon 9 | Falcón | The Maltese Falcon (1941 film) | The Maltese Falcon | Bat Falcon | Millennium Falcon | Ford Falcon (Australia) | falcon | The Falcon | Sooty Falcon | Orange-breasted Falcon | Kevin Falcon | Eleonora's Falcon | Peregrine falcon | Ford XR Falcon GT's | Falcon Heights, Minnesota | Falcon 9 v1.1 | Dassault Falcon 900 | Brown Falcon | Atari Falcon | Aplomado Falcon | The Falcon's Brother | The Falcon (band) |
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.