As per my visit on the 27.09.17 Takahe Brown Teal (not seen) Morepork Antipodes Island Parakeet South Island Kaka Mallard Paradise Shelduck Grey Duck New Zealand Scaup
When I was there in November 2012, they also had Kea, Red-crowned Kakariki and NZ Pigeon. The waterfowl enclosure had signs for Paradise Duck, Grey Duck, Mallard, Brown Teal and Pukeko, although I only saw three birds in there (a Paradise Duck, a Mallard, and a Canada Goose).