Just had the chance to explore some of the mainland Nikau Habitat on the West Coast of the South Island, and collect some seed.
Never spent much time looking into this palm in habitat but it's incredible the variation depending on location, above/below canopy, and distance to the coast. Underneath the canopy they spread very wide, almost like Coconut or bangalows... there was many with green fronds below horizontal. After getting above canopy they turn into the typical shuttlecock shape.