Cheetahs use a variety of vocalizations and body language to communicate. For example, they may purr when content or chirp when seeking contact with other cheetahs. Cheetahs also use various visual cues to communicate, such as tail flicking or flattened ears, which can convey aggression or fear respectively. In addition, cheetahs are able to produce a unique vocalization known as a “rawling”, which is thought to function as a long-distance contact call between members of the same clan.