White rhinoceroses are larger than black rhinoceroses and have a nuchal hump, a longer head, a straighter back, and a square lip, as opposed to the hooked lip of the black rhino.
The white rhinoceros may be distinguished externally from the sympatric black rhinoceros, (Diceros bicornis,) by a larger size, presence of a nuchal hump that is more obvious when the head is held up, a long head, square lip, enlarged horn-bases, and a straight back with marked presacral.
The white rhinoceros’ head is normally held low and the lips are flat, squared. and broad, suitable for grazing. The lower lip bears a hardened pad.
The average length of the white rhinoceros’ head and body, not including tail, is 3.35 to 3.77 meters. The average length of tail of white rhinoceroses ranges from 0.57 to 0.77 meters. In addition, white rhinoceros average shoulder height is 1.71 to 2.85 meters, whereas their average girth is between 2.01 and 2.20 meters.