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
Nin Jiom Pei Pa Koa Nin Jiom Pei Pa Koa King-to Nin Jiom Pei Pa Koa (), commonly known as Nin Jiom Pei Pa Koa or simply pei pa koa (), is a traditional Chinese natural herbal remedy used for the relief of sore throat, coughs, hoarseness and aphonia. It is a throat demulcent and expectorant. In the name of the company, "king-to" means "capital", referring to Peking and "nin jiom" means "in memory of my mother"; hence, it stresses the important virtue of filial piety. "Pei pa koa" means "loquat syrup". The product is marketed under the brand name Cap Ibu dan Anak (Malay