Cheetahs make a variety of sounds to communicate, each with a different meaning. Unlike big cats like lions and tigers, cheetahs cannot roar. Instead, they produce high-pitched chirps to call out to each other, especially between mothers and cubs. They also use growls, hisses, and moans to show aggression or discomfort. One of their most unique sounds is purring, which they do when relaxed, content, or bonding with companions. Unlike domestic cats, cheetahs can purr both while breathing in and o