FIGURE 5 in A taxonomic revision of the Paramo Tapaculo Scytalopus canus Chapman (Aves: Rhinocryptidae), with description of a new subspecies from Ecuador and Peru

FIGURE 5. Beginning of song of northern S. c. opacus from Azuay, Ecuador, including two introductory notes. In southern S. c. opacus there is usually no introductory note and if present, it is of the same pitch and quality as the following notes.