Here are some orthographic studies I did of a white rhinoceros:
A realistic color study of a white rhino:
And a character, Rita the cheerleading rhino:
Lesson Learned: When characterizing wild animals, make sure that you note the gender differences within that species. In my research, I learned that female white rhinos can weigh up to half a ton less than males, and they also have a less pronounced shoulder hump and shorter horns than their male counterparts. This information helped me to make Rita look more feminine, and I will also need to keep those gender distinguishing characteristics in mind when I go on to design the guys that play football for the Rhinos.