Ou

The Ou, or Psittirostra psittacea, was once a widespread inhabitant of the Hawaiian Islands, particularly thriving in the upland forests of the archipelago. As a member of the Hawaiian honeycreepers, its evolution was closely tied to the islands' unique flora, with the species possessing a specialized, parrot-like beak perfectly adapted for extracting nectar and fruits from native plants like the ieie vine. Indigenous Hawaiians deeply valued the bird for its bright green and yellow plumage, utilizing its feathers in the construction of traditional capes and cloaks reserved for high-ranking royalty.

Scientific documentation of the species began following early western contact, with naturalists noting its distinct broad wings and rounded tail, which aided its maneuverability in dense forest canopies. Throughout the 19th and early 20th centuries, as agricultural expansion and the introduction of non-native species began to disrupt island ecosystems, the population of the Ou declined sharply. Despite its historical significance and presence in early avian collections, the species is now considered one of the many tragic losses of Hawaiian biodiversity, with the last confirmed sightings occurring in the late 20th century.