Song: A variety of slightly squeaky shrill nasal chattering: "see-yah!" or "tchiir tchiir tchiir-ah" and short harsh "teer" or "tcheea" notes.
Sound: Fernando González-García (Biblioteca de Sonidos Aves de México); 2005 Sept 17; Mexico, Veracruz; Mahuixtlan, Coatepec; Adult; Call;