Species of the genus Elaenia are difficult to distinguish from one another using only
morphological characteristics. In Brazil, Elaenia chiriquensis occurs from northern
Paraná to Roraima and is absent in Santa Catarina and Rio Grande do Sul states. Using
audio and photographic evidence, as well as the comparison of sonograms, we confirm
the occurrence of this species 700 km southwest of its previously known distribution.
Our new record is from Palmas, Paraná, only 600 m from the border with Água Doce,
Santa Catarina, which suggests the possibility that this species also occurs in this
state. Deforestation for monocultures and pastures might have contributed to this
species’ expansion in the Atlantic Rainforest biome.