The Many-colored Rush Tyrant is truly a well-named bird. Among a family of frequently dull-plumaged and similar birds, it is positively gaudily attired, and it is wholly dependent on reedy marshes and lake edges for breeding. It forages alone, in pairs, or small family parties, searching acrobatically for insects that are perch-gleaned. The underparts and supercilium are entirely yellow, except for the white throat, the mantle is olive-green, the tail and wings are black with a bold white pattern on the coverts and tertials; there is a black bar on the breast sides, and a red patch on the nape, and another on the undertail coverts. Many-colored Rush Tyrant is resident over much of Chile and Argentina, with smaller extensions of its range north to southeast Brazil in the east, and western Peru in the west, and it occurs from sea level to altitudes above 4000 m.