Chaetoptila angustipluma

Chaetoptila angustipluma, the kioea, is an extinct Hawaiian bird of uncertain family placement, last recorded alive in the 1850s on the Big Island. Approximately 33 cm long, it was among the largest of the endemic Hawaiian songbirds. The species name angustipluma ('narrow feather') refers to its distinctive plumage. Its extinction is attributed to introduced disease, predators, and habitat degradation following Western contact.