Forming monogamous pairs that last over several breeding seasons (6), both the male and female maintain the territory they share with their dependent offspring year-round (5). During the breeding season, the female constructs a cup-shaped nest made of lichen and small twigs in the outer forks of a mature ohia tree (Metrasideros polymorpha). She lays a single egg and incubates it alone, while the male provides her with food. Both parents care for the chick for five to eight months until the chick’s foraging skills have improved and its bill has strengthened (6).
The Maui parrotbill feeds mainly on the larvae and pupae of wood- and fruit- boring beetles and the larvae and pupae of moths, as well as other invertebrates (2).