This is a New Zealand Falcon. They're found in most parts of New Zealand but are considered an uncommon endemic. Endemic = a species that is natural or native to a specific place. I've seen a few but the harrier, an abundant native, is most likely the bird of prey that you'll see in New Zealand skies (or on the roads)! I see them flapping madly trying to lift a dead possum or hedgehog off the road before getting run over. Consequently, I've seen quite a few flat harriers on New Zealand's highways.
285 - New Zealand Falcon
7" x 5" oil study on board, unframed
US $85 plus $7 shipping