At dawn in a North Island forest with intact predator control, the kōkako begins. The song is organ-like, slow, and resonant, carrying through the canopy in long phrases that some people find meditative and others find unsettling, depending on what they brought to the forest. It is not a sound that blends into the background. It is a sound the forest, at its best, is built around. Callaeas wilsoni is a grey forest bird roughly the size of a pigeon but considerably more deliberate in everything it does. The legs are long and strong, the wings short and rounded, and flight is limited to short gliding arcs between trees rather than sustained travel. Adults carry bright cobalt-blue wattles at the base of the bill, small and pale in juveniles, intensifying with age to a blue that is visible from a reasonable distance. The black face mask and dark bill give the head a defined, formal look. The overall impression is of something ancient that has thought carefully about its situation and arrived at an arrangement it finds acceptable. On the mainland, kōkako require tall lowland podocarp-hardwood forest, particularly stands where tawa is a significant canopy component. The diet is dominated by leaves, fruit, flowers, and buds, gathered slowly through the canopy and understorey. Kōkako are not strong fliers but are agile in trees, hopping between branches, climbing trunk faces, and occasionally dropping to the forest floor for fallen fruit. Movement within a territory is extensive and systematic. Movement between territories is rare enough to matter when managers are thinking about population connectivity. The kōkako's trajectory through the twentieth century is one of the more instructive conservation case studies in New Zealand. By the late 1980s and early 1990s, many populations had collapsed as ship rats consumed eggs and chicks, and possums competed directly for food and foliage. Intensive predator control, combined with targeted translocations to reinforce or restore populations, reversed that decline across multiple sites. The current population of around 2,300 pairs represents a genuine recovery from critically low numbers and is classified by DOC as Nationally Increasing. What that classification means operationally is that kōkako do not maintain themselves without sustained intervention. Every breeding pair on the mainland exists because traps are being checked, poison is being applied, and the forest around them is being actively defended. The song carries a long way at dawn. Keeping it there is the work.