The magnification is too small to show the zebra striping of the pearlite.
From certain differences in the striping of the legs, as well as from variation in skull-characters, the existence of more than a single species has been suggested; but further evidence is required before such a view can be definitely accepted.
In the typical form the stripes do not extend on to the limbs or tail; but there is a great variation in this respect, and as we proceed north the striping increases, till in the north-eastern E.
The species ranges from the Orange river to the confines of Abyssinia, but its more northern representatives show a gradual increase in the striping of the legs, culminating in the north-east African E.
In its relatively long ears and general build it approaches the African wild asses, from which it chiefly differs by the striping (which is markedly different from that of the quagga-group) and the reversal of the direction of the hairs along the spine.