Infrasonic Communication

Infrasonic sounds refer to those that are below the range of human hearing, but can be heard by certain animals. Not much research has been done on this means of communication, but the Sumatran Rhino has been found to emit a whistle followed by a sharp burst of air that can carry for up to 12 miles, or almost 20 kilometres.

Body Language

By using their bodies, rhinoceroses can communicate extensively with one another. They may flatten their ears to warn another animal off, rub sides with another rhino as a sign of affection, or bash their heads into bushes, as is the case of bulls showing aggression. Curiosity is indicated by erect ears and tails, while calves might swing their heads to invite others to play with them.