Ash-colored Tapaculo Myornis senilis

Moderately distinctive as far as tapaculos go, with its pale gray color, pale tawny undertail coverts, and notably long tail. Found in the Andes from Colombia to Peru, where it is difficult to see in the dense understory. Especially fond of areas with bamboo. Listen for the song: a long, often stuttered trill, usually with some harsh introductory notes.