RS, Brazil.
It is found in marshy areas of north-eastern Argentina, south-eastern Brazil, and Uruguay. It occupies a similar ecological niche to some reed warblers in the far unrelated family Acrocephalidae.
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Furnariidae
Subamily: Furnariinae
Tribe: Furnariini
Genus: Limnornis Gould, 1839
Species: L. curvirostris Gould, 1839
Binomial name: Limnornis curvirostris