A heavy bird that once shuffled through the wetland margins of the North Island, built like a feathered bowling ball and moving with the same level of urgency. Its wings had given up the job of flying somewhere along the evolutionary line. What remained were stubby appendages good for balance and not much else. The coot made no apology for this. Flight is exhausting anyway. Fossil evidence suggests a bird weighing around two kilograms, substantially heavier than its Australian relative, the Eurasian coot. That extra mass came with trade offs. The giant coot could not lift itself off the water. It could not escape a rising flood by climbing into the sky. What it could do was eat. A lot. It grazed on submerged aquatic plants, sedges and the soft shoots of raupō, cropping the margins of its home pond with the steady patience of a living lawnmower. Breeding happens quickly in flightless birds, or it does not happen at all. The coot built floating nests from decomposing vegetation, anchored to reeds in water deep enough to deter egg thieves. Clutch sizes are unknown but probably small. Raising chicks in a wetland full of eels and larger predators requires vigilance. How much vigilance a two kilogram coot could muster is unclear. Then the rats arrived. Kiore, carried in Polynesian waka, spread through the North Island like a quiet plague. They climbed, swam and ate everything that could not run fast enough. Ground nesting birds made easy targets. Slow moving birds made easier ones. The giant coot stood no chance. By the time Europeans began writing down what they saw, the bird was already gone. No sketch survives. No detailed account. Just bones pulled from swamp sediments and cave floors, a handful of fragments that hint at what shuffled through the reeds when nobody was watching.