The majority of the sounds that buffalo make are those that resemble grunts and mumbles. A mother buffalo will make a gargling sound when she calls her calves to her to warn of nearby danger, and buffalo that are scared or angry will make a loud and explosive grunt-like sound.
Buffalo also communicate with body movements. Like many large animals, they will charge at anything if they feel threatened or if they feel they need to protect their young. Another body movement in response to threats is when a buffalo points its head high with the muzzle pointed out as if to show attitude.