Beautiful soft light and such lovely plumage detail. I like the green in the background, but I might clean up the dark spots on the beach area a bit, especially the small black spot at the bottom edge. Wonderful capture.
Nice to see an NZ bird posted, Jason. Lovely textures and colours in the breeding plumage. I agree with Linda's suggestions but would probably crop in closer to remove the dark spot on the beach and then lighten the OOF BG dark areas. A slight head turn toward the camera would add to the image and maybe a slight reduction in flash intensity. They must have been doing a lot of banding in your area as none of the ones I have shot at Miranda or Ohope have been banded.