The ʻanianiau (Magumma parva) is a species of Hawaiian honeycreeper that is endemic to upper elevation forests on the island of Kauai. This species seems to be rather distantly related to the typical Hemignathini (such as the ʻamakihis and nukupuʻus). It is placed in the monotypic genus Magumma.
The 'anianiau is a brightly plumaged yellow bird and at 10 centimetres (3.9 in) in length, the smallest Hawaiian honeycreeper. The ʻanianiau has a slightly curved bill and a mass of about 10 g. The plumage of the female is more uniform and has a duller yellow-green color than the male's bright yellow. Its call is a pair of notes, tew-weet, while its song is a trill of wee-see, wee-see, wee-see.