Crescent Honeyeaters form long-term pair bonds, staying together throughout the year. Pairs nest on their own or in loose colonies. Males defend territories, which are all-purpose (feeding and breeding) throughout the year, becoming more active and vocal during the breeding season. The female builds the nest alone, in a well-concealed position, usually low in the centre of a shrub and often near water. The bulky cup-shaped nest is made from bark, grass, twigs, roots and other plant materials, lined with grass, down, moss and animal fur or hair. The female alone incubates the eggs and broods the young but both sexes feed the nestlings and may continue to feed fledglings for up to two weeks after leaving the nest.