Also feline "purr" as rabbits, squirrels, guinea pigs, tapirs, elephants, gorillas and raccoons Bashny.Net

Purring is a sound that can make all, without exception, a cat and two species of genet (a cross between cats and mongooses). Purring cats have different sounds in different ways, but in general it can be described as tonal buzz.

In addition to the cat and genet bad manages to make sounds identical to purr and other animals: rabbits, squirrels, guinea pigs, tapirs, gorillas and even elephants. However, if you use a strict definition of purr like sound being played constantly on the inhalation and exhalation, only the vocal cords and genet cat fully comply with this process.

via factroom.ru