This article reminded me of the Takiroa Rock Art Shelter in North Otago that I had recently read about in Historic Places in New Zealand by Gavin McLean, Hodder Moa Beckett Publishers Ltd.
Apparently this area was a popular hunting ground and would have been used as a place of shelter, perhaps by travelling hunter gathers who lived in the locality. McLean notes that the images vary from abstract forms to humans, animals and bird life. Other images of sailing ships suggesting the art was revived after or during the arrival of European settlers.
If you are planning a visit, as I will in the future, please visit this site with regard to cultural issues and protcol:
Ngai Tahu Maori Rock Art Trust