Its dark-gray body is marked by a rusty throat and breast. In fast mountain streams in northwestern Argentina, it wades and searches among stones for larvae and insects.
There is little sexual difference in plumage: the body is dark gray with a rusty throat and breast. The white wing band is visible when the bird flaps.
It moves along stones and stream banks, wading to take larvae and insects. In winter it moves to lower elevations.
An extinction-risk assessment has not been added yet.