Tracking down a rhino on a huge safari can be a difficult task, but rangers and guides have a secret weapon - poo!
Clues in the dung, or midden as it's also called, help them work out which species left it behind and where they might be.
Rhino also use their poo to communicate with each other, because each animal's waste has its own unique smell.
Sometimes they leave dung to mark their territory or they use it to find a mate, because rhino can smell the difference between male and female poo.
Field guide Jo Haesslich from Kariega Game Reserve in South Africa has more....