The Maui parrotbill or kiwikiu (Pseudonestor xanthophrys) is a species of Hawaiian honeycreeper, that is endemic to Maui in Hawaii. It can only be found in of mesic and wet forests at on the windward slopes of Haleakalā. This species is critically endangered, with an estimated population of only 500 individuals. Fossil evidence indicates that the bird could at one time be seen in dry forests at elevations as low as , as well as on the island of Molokaʻi.