Despite their names, Black and White rhinos are similar in colour. So how do you tell them apart? One of the best ways to figure out what kind of rhino you are looking at is to check out their lips. A Black rhinoceros has lips that are prehensile, which means they are designed to grab things, this feature comes in handy as they feed on leaves and twigs. Their cousins the White rhinoceros has square lips that are designed for grazing.