Description
Hemignathus ellisianus (Original description: Hemignathus procerus, Cab. 1. male adult, 2. juv., 3. female.)
Date 1893-1900
Source Walter Rothschild. The Avifauna of Laysan and the neighbouring islands with a complete history to date of the birds of the Hawaiian possession. London: R.H. Porter, 1893-1900.
Author Artist/Künstler: John Gerrard Keulemans (1842-1912)
Source: https://commons.wikimedia.org/wiki/File:Hemignathus_procerus.jpg

The Kauaʻi ʻakialoa (Akialoa stejnegeri) was a finch in the Fringillidae family. It was endemic to the island of Kauai, Hawaii. It became extinct due to introduced avian disease and habitat loss. The Kauaʻi ʻakialoa was about seven and a half inches in length and had a very long downcurved bill, which covered one third of its length. The adult males were bright olive-yellow on top and yellow on the bottom. The throat, breast, and sides of the body were olive-yellow. The females, however, were green-gray above and had a shorter bill. Order: Passeriformes, Family: Fringillidae, Subfamily: Carduelinae, Species: Akialoa stejnegeri (Wilson, 1889), Synonyms: Hemignathus ellisianus stejnegeri.