Song: Simple song of repeated slightly mournful whistles "chee-oo" or "twee-twoo". Song phrasing is smoother and less hesitant than Red-throated Ant-tanager.
Sound: Fernando González-García (Biblioteca de Sonidos Aves de México); 2002 Jul 22; Mexico; Estación de Biología Tropical "Los Tuxtlas", San Andrés Tuxtla; Adult; Primary Sound;