The male has a black crown, a long white supercilium and a broad black band through the eye. The species ranges from southeastern Brazil through eastern Paraguay to Misiones, Argentina, and searches for arthropods in bamboo thickets.
The male has a black crown, a long white line above the eye and a broad black band across the eye.
It uses bamboo thickets in montane and lowland evergreen forest and mainly searches for arthropods.
An extinction-risk assessment has not been added yet.