notornis(n = noun.animal) notornis mantelli, takahe - flightless New Zealand birds similar to gallinules;
is a kind of rail
is a member of genus notornis

   A genus of birds allied to the gallinules, but having rudimentary wings and incapable of flight. Notornis Mantelli was first known as a fossil bird of New Zealand, but subsequently a few individuals were found living on the southern island. It is supposed to be now nearly or quite extinct. [1913 Webster]

notornis, n. a rare flightless New Zealand bird, Porphyrio mantelli, with a large bill and brightly coloured plumage. Also called TAKAHE.

Etymology:
Gk notos south + ornis bird

genus notornis, notornis mantelli