The Chestnut-backed Antbird, Myrmeciza exsul, is a passerine bird in the antbird family. It is a resident breeder in tropical Central and South America from eastern Nicaragua to western Ecuador. It occurs in lowlands up to 900 m altitude. This is a common bird in the understory thickets of wet forest, especially at edges, along streams and in old treefall clearings, and in adjacent tall second growth. The female lays two purple or red-brown spotted white eggs, which are incubated by both sexes, ...