A large, uniformly plumaged antbird, Zeledon's Antbird generally sings from dense cover, and is therefore not necessarily easy to observe. Males are basically all black, with the exception of the dull blue orbital skin around the red irides, while females are essentially warm brown overall, becoming duskier over the face and throat, with a blackish tail, and share the bare surround to the eyes. Zeledon's Antbird ranges from Nicaragua south to Panama, western Colombia, and western Ecuador. The species occupies the understory of humid evergreen forest, usually on hillsides, and frequently in areas where there are treefalls or natural light gaps; it has been recorded locally to up to ca 2000 m elevation. Formerly Zeledon's Antbird and Blue-lored Antbird (Hafferia immaculata) were considered a single species, known as Immaculate Antbird, which was classified in the genus Myrmeciza. The recently proposed genus Hafferia, in which Zeledon's and Blue-lored antbirds now are classified, is named on honor of the late German ornithologist Jürgen Haffer.