 The "Headslap" often involves antagonistic interactions between males and those that do not participate in antagonistic interactions will often lunge toward a female.In response to both the lunge and "Headslap", the female will produce the growl in order to project her sex and location.The growl serves as a signal to the male that his display has been recognized and so the female produces the growl in order for the make to know her location for mating.