It's the chinese that love dragons. i.e they used to worship them and many still do. They have dragon dances or lion dances.
Yea, its part of their culture. But since maori are originally descended from asian countries, they have kept some of that animal worship. So it's Taniwhas to them. Since they live underground, any area that's their territory is 'tapu' or taboo.
I know this sounds like something out of the Hobbit, but you know that was filmed in NZ too. Although that dragon is actually digital. lol.