 The bird's only known vocalization was an inconspicuous chirp; however, all other Hawaiian honeycreepers are excellent vocalists that demonstrate an array of sounds, and therefore the hookbill likely had a broader, unrecorded repertoire.The Lānai hookbill was endemic to the island of Lānai in Hawaii.All recorded sightings of the species were made from the southwestern end of Lānai's forests, which included the Kaiholena Valley and Waiakeakua.