Cheetahs make a weird snarl sound. If I read "roar of a cheetah", it's exactly this sound I would picture. Same with an elephant... "roar of an elephant" would give me images of an elephant making a loud elephant noise (eg not a lion noise). Third example: Katy Perry saying "hear me roar"... well humans aren't good at that activity but I can still visualize it.
I suppose I'm asking if the quote in OP was presented in a symbolic nature or factual?
The sentence was/is presented as an example where the author may not in fact know he/she has made an error. And many times, we as reviewers simply read over and accept it without comment because we are also unsure.
To quote:
***Cheetahs purr whereas big cats such as leopards,jaguars,lions, and tigers do not have the purring capability. Only these true large cats listed above can roar. Cheetahs do not roar because they do not have the capability of "true" large cats.***
Thanks for the input. Take care. Vern