Rhinos have a complete body language vocabulary, most meaningful when used with other Rhinos, who are attuned to the gestures.
The Shrug is a good beginner’s gesture, meaning Ignorance (who knows?) or Indifference (who cares?). A Starter’s Set, involving a blank expression and shoulder lifts. With time, it can be enhanced or nuanced to mean just about anything.
Thus Rhinos can be critters of few words, but maintain our reputation for Eloquence.