Research overview: the evolution of roaring in big cats

The ability to roar distinguishes the genus Panthera and is tied to specialized anatomy of the larynx and a flexible hyoid apparatus, while smaller cats purr instead. This overview surveys the anatomical and developmental basis of roaring, its restriction to certain Panthera species, and how this trait maps onto the molecular phylogeny of the big cats. It discusses the functional significance of the roar in long-distance communication and territory advertisement, the evolutionary loss or modification of the trait in some lineages such as the snow leopard, and how integrating anatomy with phylogeny clarifies when and why this distinctive vocal adaptation arose in the cat family.