Small-headed elaenia

The small-headed elaenia ("Elaenia sordida"), also known as the Brazilian elaenia, is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in southeastern Brazil, eastern Paraguay, and northeastern Argentina.
Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, subtropical or tropical moist shrubland, and heavily degraded former forest.