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big cat
The terms big cat and great cat, while not a biological classification, are used informally to distinguish the larger felid species from smaller ones. A narrower definition of includes five members of the genus ''Panthera'': the tiger, lion, jaguar, leopard, and snow leopard. Only members of this genus are able to roar. A more expansive definition additionally includes the cougar and cheetah. Another cat, the clouded leopard is considered an evolutionary link between big and small cats.
Despite enormous differences in size, various species of cat are quite similar in both structure and behaviour, with the exception of the cheetah, which even more significantly stands out from the other big and small cats. All cats are carnivores and efficient apex predators.〔(Counting Cats ), Guy Balme, Africa Geographic, May 2005.〕 Their range includes the Americas, Africa, Asia, and Europe.
==Roaring==
The ability to roar comes from an elongated and specially adapted larynx and hyoid apparatus. When air passes through the larynx on the way from the lungs, the cartilage walls of the larynx vibrate, producing sound. The lion's larynx is longest, giving it the most robust roar. Only members of the ''Panthera'' genus contain this elongated hyoid.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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