That continuous sound makes felines unique in their ability to purr. Domestic cats ( Felis catus ), however, aren't the only ...

Over the last year, 90,500 people asked ‘why do cats purr’, while queries for ‘how do cats express happiness’ increased by 200% and ‘cat hissing for no reason’ by 80%.

Cat Sounds. As this kitten proves, wild cats and domestic cats make so many more sounds than the stereotypical meow. They can hiss, howl, yowl, and purr!