This reedhaunter is recorded in Argentine wet grassland. Accounts describe a yellow throat patch and a local association with sedge marshes and pampas grassland.
The back is cinnamon-brown, with an ochre eyebrow and a yellow throat patch. The underparts are grayish, and the wings and tail are brown.
An annotated bird list for Parque Costero del Sur describes it as a common resident of sedge marshes and pampas grassland with Cortaderia. It notes its voice makes it easy to detect and records it as a probable breeder.
An extinction-risk assessment has not been added yet.