'O'u
Psittirostra psittacea
- Extinct
- Card rarity: Extinct
- Birds

The ʻōʻū is an extinct species of Hawaiian honeycreeper that was endemic to the Hawaiian islands. It had a dark green back and olive green underparts; males had a yellow head while females had a green head. Its unusual beak seems to have been adapted to feeding on the fruits of Freycinetia arborea. It had a strong flight which it used to fly considerable distances in search of this vine, but it also ate other fruits, buds, flowers and insects.
Classification
- Class
- Aves
- Order
- Passeriformes
- Family
- Fringillidae
- Genus
- Psittirostra