Song: High sharp "tisp" or "sip" note which may be run into a series of jerky squeaking notes "swee swee su-su-su-swit siip sip" etc.
Sound: Fernando González-García (Biblioteca de Sonidos Aves de México); 2002 May 24; Mexico, Veracruz; Las Coloradas, Coatzacoalcos; Adult; Primary Sound;