Tiger quolls are generally not vocal, but vocalisations can be heard in any social interaction. Antagonistic or disturbed vocalisations are guttural huffs, coughs, hisses, and piercing screams. "Cp-cp-cp" sounds are produced by females in estrus. Females communicate with their young with "chh-chh" and "echh-echh" calls. The former are made by females and the latter are made by young. "Juveniles vocalise frequently when fighting and their mother will hiss when they clamber over her." During antagonistic encounters, quolls also threaten each other with open mouths and teeth displays. At this time, the ears are laid back and the eyes are narrowed. Males grasp and bite each other in combat.