needs the deep ancient forest cover

Size
Length: 38–40 cm, Weight: 200–250 g
Lifespan
15–20 years
Diet
Omnivorous. Feeds on fruit, leaves, flowers, and insects. Particularly fond of supplejack berries, tawa fruit, and karamu berries. Plays vital role as seed disperser for native trees.
Habitat
Ancient, deep-canopy native forests. Requires full-spectrum structural complexity of forest not improved by chainsaw. Needs large, undisturbed blocks with dense understorey and fruit supply.
Range
Found in scattered locations throughout North Island in mature native forests with dense understorey. Strongholds include central North Island, Coromandel, Northland, and predator-free sanctuaries.
Endemism
Endemic
Main Threats
Predation by rats, stoats, and possums is primary threat, wiping out mainland populations. Also threatened by habitat loss from forest clearance and fragmentation, and competition.
Population
North Island variant is holding on. South Island version is a ghost not seen in decades. Population recovered from low of around 300 pairs in 1990s to over 1000 pairs today.
Conservation Status
Extinct
Human Risk
harmless
Handling Note
protected native bird, extremely sensitive to disturbance
Conservation Note
Endemic passerine extinct since late 19th century in South Island; North Island population is recovering.
Assessment
NZTCS Birds (2021)
Te Ao Māori
In the stories of Māui, the hero was busy trying to slow down the sun with a jawbone. The Kōkako was the one who kept him hydrated. It brought him water in its wattles. As a thank-you, Māui stretched the bird's legs. This allowed it to bound through the canopy like a feathered gymnast. It is a bird of reward and resilience. It possesses a voice that Māori traditionally associated with the very breath of the forest. To hear the Kōkako's organ-like call is to hear the ancient forest speaking directly to the soul. The connection is mythological. It is also acoustic. The link remains.
You hear it before you see it. The kōkako is the lead singer in a band that only plays at 5:00 AM. The forest has no choice but to listen. Its song is not a chirp or a tweet. It is a haunting, organ-like duet. It sounds like a cello being played in a cathedral. When a pair starts calling and responding across the canopy, the notes are deep and mournful. They seem to hold their physical shape in the damp morning air. Early European settlers used to wander into the bush looking for a giant bird. They were convinced that a sound that big had to come from something the size of an ostrich. Instead, they found a medium-sized, slate-grey bird. It had the fashion sense of a 1950s lounge singer. The expectation was grand. The reality was modest. The standout feature is the pair of electric-blue wattles at the base of the bill. They are fleshy and soft. They look entirely like a piece of jewellery that should not be attached to a living creature. The kōkako does not really fly in the conventional, flapping sense. It prefers the Māui-stretched leg approach. It bounds through the branches. It glides across gaps like a low-budget superhero. It is a forest specialist in the most stubborn sense of the word. It needs a complex, multi-layered habitat. It refuses to accept any substitutes. If the forest goes, the kōkako goes. The dependency is absolute. The requirement is non-negotiable. For years, the kōkako was a losing hand in the evolutionary poker game. Possums did not just eat their food. They ate their eggs and chicks. Rats followed suit. The kōkako is a slow breeder. It is incredibly site-faithful. It stays in the same patch of dirt for years regardless of the danger. This made it a sitting duck for introduced predators. The vulnerability was total. The exposure was constant. The loss was rapid. Only through massive, sustained predator control in sanctuaries has the At Risk – Recovering status become a reality. Locations like Tiritiri Matangi and Pureora provided the necessary protection. We are finally at a point where the dawn duet is returning to valleys. These valleys have been silent for half a century. The forest still stops to hear them. For the first time in a long time, there are actually birds there to sing. The return is gradual. The effort is sustained. The result is audible. The silence is broken. The song persists. It carries on.