Northern Prairie Wildlife Research Center
Both male and female Hawaii creepers are olive green. They are lighter underneath and have a short, straight bill and black mask. Creepers, often found in family groups or in loose flocks of mixed species, call softly to one another while flitting from tree to tree. Creeping up and down koa and 'ohi'a tree trunks and along the underside of larger branches, this bird feeds on insects living under the loose bark. The creeper is relatively common in the upper forested areas of the refuge.