Oahu Nukupuu
The Oʻahu Nukupuʻu (*Hemignathus lucidus lucidus*) was a small, insectivorous Hawaiian honeycreeper endemic to Oʻahu. Recognized by its long, curved bill adapted for probing bark and flowers, it had olive-yellow plumage with males being brighter. This species is believed to be extinct due to habitat loss, deforestation, and diseases introduced by non-native species.