This reed warbler occurs in French Polynesia. Most birds are pale yellow with mottling above, while a dark olive-brown morph also occurs. It uses bamboo thickets and second-growth forest and eats insects and other small animals as well as nectar.
Most birds are pale yellow, mottled brownish-olive above; a dark morph is uniformly dark olive-brown.
It uses bamboo thickets and second-growth forest in river valleys and on hillsides. Its diet includes insects, lizards, small fish, crayfish, snails, and nectar; it is believed to breed only in bamboo thickets.
An extinction-risk assessment has not been added yet.