Moa were nine species of now-extinct flightless birds endemic to New Zealand. The two largest species, Dinornis robustus and Dinornis novaezelandiae, reached about 3.6 m (12 ft) in height with neck outstretched, and weighed about 230 kg (510 lb). It is estimated that, when Polynesians settled New Zealand circa 1280, the moa population was about 58,000.

The nine species of moa were the only wingless birds lacking even the vestigial wings that all other ratites have. They were the dominant herbivores in New Zealand's forest, shrubland, and subalpine ecosystems for thousands of years, and until the arrival of the Māori, were hunted only by Haast's eagle. Moa extinction occurred around 1300–1440, primarily due to overhunting by the Māori.

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