Oʻahu nukupuʻu bill to pluck insects found underneath tree bark, the Oahu nukupuu fed on insects on flowering trees such as the koa ("Acacia koa") and ohia ("Metrosideros polymorpha"). These trees attract a large amount of insects due to their nectar-filled flowers. The Oahu nukupuu fed on koa in high elevation forests and fed on ohia in low elevations. The species was believed to have vanished as the spread of disease occurred, killing off nukupuu populations across the islands. In order to control the rat population in the sugar cane fields, mongooses were introduced to Hawaii and were suspected to be predators
Koa Kannon in prison and has been likened to a “little Yasukuni Shrine”. On 12 December 1971 the East Asia Anti-Japan Armed Front, an extremist group, tried to blow up the statue of the Koa Kannon, the stone monument of the seven warriors, and the Memorial Stone of the 1,068 Executed Martyrs of the Great Pacific War, which they viewed as symbols of Japanese imperialism. The stone monument of the seven warriors was destroyed but because the fuse was short the other two escaped destruction. The monument which was destroyed was restored afterwards by volunteers. Unlike a typical temple, Koa Kannon has