The territorial (or A-song) of Balsas Screech-Owl is described as "a rather loud series of gruff notes accelerating to a trill ('bouncing-ball' rhythm), book-book-bokbokbobobobrrrrr" (König and Weick 2008) or as a "bouncing-ball song [that] recalls Western Screech-Owl [Megascops kkennicottii] but gruffer, hooh-hooh hooh-hooh-hooh-hooh-hooh-hooh-hooh, etc." (Howell and Webb 1995). Both sexes sing, but the song of the female is slightly higher in pitch. Another vocalization (courtship or B-song?) is described as "a gruff, screaming whinny" (Howell and Webb 1995) or as "a series of gruff, screaming 'whinny' trills" (König and Weick 2008).