The genus Cnemotriccus, of which the Fuscous Flycatcher is, for now, the sole representative, is speculated to be most closely related to Lathrotriccus. However, many observers and researchers with widespread field experience of the Fuscous Flycatcher in its many ‘incarnations’ (some seven subspecies are generally recognized) suspect that multiple species-level taxa might eventually be proven to be contained therein. The Fuscous Flycatcher is found over much of South America east of the Andes, from Colombia and Trinidad south to northeastern Argentina, and is known to occur in a wide variety of forested habitats. All of the various races are principally warm brown above, with two obvious pale wing bars and an reasonably striking supercilium, and largely pale underparts. The species is usually found alone or in pairs, perched at lower levels, and it rarely consorts with mixed-species flocks.