The Henderson Reed Warbler is found only on Henderson Island. A field study recorded it foraging in varied places and noted individual variation in patches of white plumage.
The study recorded birds with some white feathers, and the pattern and extent of white varied among individuals and with age.
Pairs with one or two young birds were recorded. They foraged from the ground to trees and ate snails and insects as well as seeds and fruit.
An extinction-risk assessment has not been added yet.