EnglishAKA why we love the Guardian’s GrrlScientist:
“Big cat” is not a precise biological term, it is just a verbal shorthand for distinguishing the larger members of the taxonomic family Felidae from smaller ones. Some people formally define “big cats” as the four Panthera species: the tiger, lion, jaguar, and leopard. But other people also include cheetah, snow leopard, clouded leopard, and cougar under the “big cat” umbrella.
Big cats make interesting sounds. For example, only Panthera can roar. For this reason, they are often collectively known as “the roaring cats”. Roaring requires special morphology of the larynx and hyoid apparatus in the animal’s throat. Interestingly, despite having hyoid morphology similar to roaring cats, snow leopards cannot roar.
Read more at The Guardian. Or simply watch the video from Big Cat Rescue: