- A genus of ratite birds, constituting the family <em>Apterygidœ.</em>
- [<em>lowercase</em>] A bird of this genus; a kiwi (which see).
- A genus of New Zealand birds about the size of a hen, with only short rudiments of wings, armed with a claw and without a tail; the kiwi. It is allied to the gigantic extinct moas of the same country. Five species are known.
- nocturnal flightless bird of New Zealand having a long neck and stout legs; only surviving representative of the order Apterygiformes