Song: Song is an accelerating series of high squeaky "t-wee" notes varying pitch like a Black-and-white Warbler and ending with an uplsur. Calls are sharp "tisp" notes.
Sound: Fernando González-García (Biblioteca de Sonidos Aves de México); 2004 Apr 24; Mexico, Veracruz; El Volcancillo, Las Vigas de Ramirez; Adult; Primary Sound;