The Hawaii Mamo was one of the first Hawaiian birds to come to the attention of Europeans and specimens were brought back from the Pacific to England by the naturalists who participated in James Cook’s third voyage. Surprisingly little is known of it, however. The birds fed on nectar, particularly from the flowers of arborescent lobelias, but they are thought also to have eaten insects. The call was described as a single, long, rather mournful and haunting note. The species was only ever noticed on the island of Hawaii and it was last seen during 1898.