This tyrant flycatcher uses wetlands and damp grasslands. A BirdLife regional record lists it at Serranías del Este in eastern Uruguay; males and females differ in plumage.
Males are mostly white with black wings and tail. Females have a grey crown and back, a white rump and a white wingbar.
The eBird species profile lists marshes and damp natural grasslands as habitats, with occasional use of coastal dunes.
An extinction-risk assessment has not been added yet.