Prusten is a form of communicative behaviour exhibited by some members of the family Felidae.[1] Prusten is also referred to as chuffing or chuffle (verb and noun).[2] It is described as a short, low intensity, non-threatening vocalization.[1] In order to vocalize a chuff, the animal's mouth is closed and air is blown through the nostrils, producing a breathy snort.[3] It is typically accompanied by a head bobbing movement.[1] It is often used between two cats as a greeting, during courtship, or by a mother comforting her cubs.[1] The vocalization is produced by tigers, jaguars, snow leopards, clouded leopards and even polar bears.[1] Prusten has significance in both the fields of evolution[1] and conservation.[3]