Southern Lapwings utter a tero-tero-tero-tero call throughout day and night (Sick 1993). This call is used in intraspecific encounters such as territorial displays, display flights, and courtship behaviors. A variation of this call is also used as an alarm call. This variation is usually composed of the same tero-tero call but at a higher repetition rate.
Vocalizations of the southernmost subspecies (fretensis, of southern Chile and Argentina), are described as harsher and more shrill than those of other populations of Southern Lapwing (Fjeldsa and Krabbe 1990), and this description also applies to the subspecies chilensis, which is found in northern Chile and central Argentina.