The blue duck (or whio; Hymenolaimus malacorhynchos) is a unique threatened species of waterfowl endemic to New Zealand. It is the only member of its genus and has no close relative anywhere in the world.
The blue duck is believed to have appeared at a very early stage in evolutionary history and the species' isolation in New Zealand has resulted in it acquiring a number of unique anatomical and behavioural features.
The Brook Stream is a possible ideal site for Blue Duck, with a fence we could reintroduce a pair.
