"Pampa" is the Brazilian biome that occurs in only one state. Besides grasslands formation, this biome has a variety of other ecosystems This work aimed to inventory the butterflies of the Parque Natural Municipal de Uruguaiana, contributing to the knowledge of this group of insects in this region. Three transects were covered in each sampling occasion: riparian forest (MC), margin of Uruguay river (MR) and grasslands (CS). After four samples along one year and a total of 99 net-hours of sampling effort 46 species were recorded, including two new records for Rio Grande do Sul and one new record for Brazil.
Brazilian Pampa; conservation; riparian forest; Southern Brazil; species richness
