Both sexes have a dark brown iris, a black bill, and medium gray legs and feet.

[11][12][13] The Sierra de Lema flycatcher is found on the foothills and slopes of tepuis where southern and southeastern Venezuela, western Guyana, and northern Brazil meet.

It inhabits the interior of humid forest, often in areas with sandy soil or those with rock outcrops and boulders.

[12] The Sierra de Lema flycatcher feeds on a variety of fruits and arthropods.

As of late 2024 xeno-canto had only two recordings of Sierra de Lema flycatcher vocalizations; the Cornell Lab of Ornithology's Macaulay Library had 16.

Its "twangy song" is a "peculiar nasal phrase starting with a low-pitched drawnout vibrating note immediately followed by a much higher-pitched rising trill trrrrraaa-rrreeeee".

[12] It is "[n]ot considered to be threatened by habitat loss, as few roads penetrate its distributional range and human population is small".