Lions, tigers, leopards and jaguars are the only cats that can roar. The sound is produced by a specialised larynx and flexible hyoid bone and can be used to stake territory, communicate generally or express anger. The four roaring cats are some of the world's most photogenic animals, whose lethal stealth and grace has inspired many film-makers. They feature in many of the classic BBC series from Life of Mammals and Wild Africa to Big Cat Diary and Planet Earth, with such video gems as a night-time lion hunt and glimpses of the world's rarest big cat, the Amur leopard.
Did you know?
There are only four species of cat that can roar. This is because they have a specialised larynx and a flexible hyoid bone.
Scientific name: Panthera