Kona grosbeak - The Kona Grosbeak is an extinct species of finch in the Hawaiian honeycreeper subfamily, Drepanidinae. The Kona Grosbeak was endemic to naio forests on ʻaʻā lava flows at elevations of 1,400–1,500 metres near the Kona District on the island of Hawaii. The species was already very rare when it was first discovered, being found in only about 10 square kilometres , and was last collected in 1894. Reasons for its extinction are not very well known. The genus is known from fossils from Kauai, Oahu and Maui.