Today the total population of all the rhinoceros species combined is probably fewer than 30,000. The precarious state of the surviving species (all but one are endangered) is in direct contrast to the early history of this group as one of the most successful lineages of hoofed mammals. sondaicus), and the Sumatran rhinoceros ( Dicerorhinus sumatrensis) live in Asia. The white rhinoceros and the black rhinoceros ( Diceros bicornis) live in Africa, while the Indian rhinoceros, the Javan rhinoceros ( R. Only African and Asian elephants are taller at the shoulder than the two largest rhinoceros species-the white, or square-lipped, rhinoceros ( Ceratotherium simum), which some divide into two species ( northern white rhinoceros and southern white rhinoceros ), and the Indian, or greater one-horned, rhinoceros ( Rhinoceros unicornis). Rhinoceros, (family Rhinocerotidae), plural rhinoceroses, rhinoceros, or rhinoceri, any of five or six species of giant horn-bearing herbivores that include some of the largest living land mammals. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.