The Carolinian Reed Warbler is native to the Federated States of Micronesia. It uses dry grassland, gardens, and tropical mountain forest, searching for small animals on the ground and among trees.
Adults weigh about 28 g and are medium-sized among passerine birds.
It uses dry tropical grassland, gardens, and tropical mountain forest, taking invertebrates from the ground and within forest.
An extinction-risk assessment has not been added yet.