Medium-sized open country flycatcher of Chaco woodland and flooded grasslands in N Argentina, W Paraguay, and SE Bolivia. Male from other Knipolegus by, in male, all dark wingsand grayish (as opposed to deep black) plumage. Female told from other female Knipolegus by dull, indistinct streaks on underparts, brown cap, rufous rump, and dull reddish iris. Prefers exposed perches in open thorn forest, roadsides, agricultural lands, and towns.