Auras are a phenomenon for which Rhinos are well known. We exude crackling energy as We trundle along. It’s like the rays of the sun, electrical exhaust. We are astounding. We glow.
Each Rhino’s color range is particular to that beast. We don’t get much to say about our own aura, just the same as our scent. Rhino auras are definitely expressive of emotion or age or relationship, etc., and sometimes conflict with themselves.
We often wonder why so many other critters lack an aura. There is no record that Rhinos invented auras, but it is a possiblity that science should not dismiss.