A distinctive Scytalopus tapaculo: dark gray overall with pale throat and breast, dark chestnut belly, and an obvious pale eyebrow. In typical tapaculo fashion, acts like a mouse, scurrying around on or near the ground within montane forest. Very difficult to see. Fairly common within extremely limited range in Cerro Tacarcuna and Cerro Mali near the border of Panama and Colombia; the only Scytalopus that occurs there. Far more often heard than seen; listen for short series of four to seven “enk! enk! enk!” notes.