Hawaiian honeycreeper
The nukupuu (genus "Hemignathus") is a group of critically endangered species of Hawaiian honeycreeper in the family Fringillidae. There are no recent confirmed records for any of the species and they may be extinct or functionally extinct. Habitat was dense mesic and wet forest of ōhia lehua ("Metrosideros polymorpha") and koa ("Acacia koa") at altitudes of .