<hw>Riro-riro</hw>, <i>n</i>. a bird. Maori name for the Grey-Warbler of New Zealand, <i>Gerygone flaviventris</i>, Gray. See <i>Gerygone</i>.

1888. W. L. Buller, `Birds of New Zealand,' vol. i. p. 44:

[A full description.]

1889. Cassell's `Picturesque Australasia,' vol. iv. p. 163:

"A little wren managed to squeeze itself through, and it flew off to Kurangai-tuku, and cried, `Kurangai-tuku, the man is riro, riro, riro!'—that is, gone, gone, gone. And to this day the bird is known as the riro-riro."

<hw>River-Oak</hw>. See <i>Oak</i>.

<hw>Roa</hw>, <i>n</i>. another Maori name for the largest or <i>Brown Kiwi</i> (q.v.). In Maori the word <i>roa</i> means long or big.

<hw>Roaring Horsetails</hw>, <i>n</i>. a slang name for the <i>Aurora Australis</i>.

<hw>Robin</hw>, <i>n</i>. The name, in consequence of their external resemblance to the familiar English bird, is applied, in Australia, to species of the various genera as follows:—

Ashy-fronted Fly-Robin—
<i>Heteromyias cinereifrons</i>, Ramsay.