Rhinos are one of the most endangered animals in the the world, such as the northen white rhino. It is said that only 4 northen white rhinos are left in the wild. My favorite kind of rhino is the black rhino. Its hard to tell the differince between a white rhino and a black rhino. The way you can tell them apart is that the white rhino is much larger then the black rhino, and the black rhino has a beak-like mouth for grasping things. The white and black rhino are both actually a light grey color. Rhinos eat vegatation.