White rhinos are like most animals creatures of habit. They sleep most of the day and wake up late afternoon to walk slowly towards the nearest waterhole to have a drink and roll in the mud. The mud is good for the skin and cool them down. A lot of parasites like ticks will get caught in this layer of mud.  Rhinos will then get rid of them by rubbing themselves on their favorite rubbing post usually not too far away from the waterhole.