Wild from Africa

How come a black rhinoceros sometimes looks white and a white one sometimes looks black? Why does a giraffe have to bend down to drink even though it has such a long neck? Why does a zebra gather a harem around it? Why do we call the lion the king of the jungle? Why are hyenas such smart hunters? Did you know that an elephant needs 150 kilos of food every day? And that a cheetah goes from 0 to 100 kilometers per hour in 3 seconds? Many sports cars can't match that. But did you also know that they sometimes eat watermelon to get enough fluids?