The Oʻahu nukupuʻu (Hemignathus lucidus) was a species of nukupuʻu which was similar to its cousins from the Islands of Kauaʻi and Maui. The species was believed to have vanished as the spread of disease occurred, killing off nukupuʻu populations across the islands. In order to control the rat population in the sugar cane fields, mongooses were introduced to Hawaii and were suspected to be predators that stole nukupuʻu chicks from nests, furthering the decrease in nukupuʻu population. Order: Passeriformes, Family: Fringillidae, Subfamily: Carduelinae, Species: Hemignathus lucidus (Lichtenstein, 1839), Synonyms: Hemignathus lucidus lucidus.
