Klages's Antbird (Drymophila klagesi)

Until recently considered conspecific with D. caudata (along with D. hellmayri and D. striaticeps), but acoustic and genetic data#R indicate significant differences. Differs from D. caudata in its greatly reduced streaking on throat and breast of male (2); male loudsong with typically two vs four to six (2) even vs rising (2) introductory notes#R; and occurrence at low elevation (500–1800 m) vs high (1800–2300 m) (1); from D. hellmayri in its greyish vs reddish-tinged grey uppertail (1); greatly reduced streaking on throat and breast of male (2); lack of black subterminal tailband (1); no preceding overslurred note in male loudsong (2), and both long-note call and short-note call differing in certain characters (allow 1); and from D. striaticeps in its greatly reduced streaking on throat and breast of male (2); black patch on mid-crown to hindcrown vs none in male (2); occurrence at low elevation (500–1800 m) vs high (1800–2300 m) (1); male loudsong with lower maximum frequency of the two introductory notes (2) plus no preceding overslurred note (2). Birds of Sierra de Perijá previously separated as race aristeguietana but in recent revision no genetic, vocal or plumage differences detected#R. Monotypic.