The vocalizations for the Common Diuca-Finch are described as a melodious, high-pitched succession of 4-5 notes, including underslurs in the middle notes, and most commonly with an accent on the final note: “tiiup tweep chwuup TWEEIP” (Jaramillo 2003, Perlo 2009). The calls can be variable depending on time or day or between subspecies in different regions or even within the same call, sometimes beginning with a high pitched, pure “BEE,” or including a drop on the last note “pew,” or only including 3 notes. The songs feature the distinctive “tiiup tweep chwuup." The songs usually last between 2-4 seconds, average of 3 seconds. Amount of time between calls is highly variable. In some areas, locals use the mnemonic "tres chuachas y un diez" (three green beans and ten) to describe the song (Bullock 1940).