About Limnornis curvirostris Gould, 1839
The curve-billed reedhaunter (Limnornis curvirostris Gould, 1839) is a small furnariid bird. It measures 15 to 17 cm (5.9 to 6.7 in) long and weighs 27 to 30 g (0.95 to 1.1 oz). Its plumage closely resembles that of some Old World reed warblers of the genus Acrocephalus. It has a long, noticeably decurved bill, and the plumage of male and female individuals is identical. Adult curve-billed reedhaunters have a whitish supercilium, an ill-defined dark brown band behind the eye, lighter brown ear coverts with thin whitish streaks, and a whitish malar area. The crown, nape, back, rump, and uppertail coverts are rich brown; the brown is darkest on the crown, and gradually becomes more rufescent toward the uppertail coverts. The wings and tail are rufescent brown. The throat is whitish, the breast is a buffier shade, the belly is creamy buff, the flanks are cinnamon-buff, and the undertail coverts are rich buff. The iris is brown, the maxilla is brown to blackish, the mandible is a mix of whitish and brownish, and the legs and feet are grayish. The curve-billed reedhaunter is distributed in the Brazilian state of Rio Grande do Sul, southern Uruguay, and the Entre Ríos and Buenos Aires provinces of eastern Argentina. It primarily lives in freshwater marshes, and can also be found in brackish habitats such as coastal lagoons. The vegetation in these habitats is often dominated by the sedge Scirpus giganteus and the grass Zizaniopsis bonarinsis. The species is essentially coastal, and occurs at elevations ranging from sea level up to only about 100 m (330 ft).
