 If available, it will sip nectar from koa ("Acacia koa") or ōhia lehua ("Metrosideros polymorpha").The breeding season of the Hawaii creeper lasts from April to July, during which female birds lay one to three eggs.Nests are hidden in a tree cavity or built on a high branch in either a koa ("Acacia koa") or a ōhia lehua ("Metrosideros polymorpha").