zebra

In body form all equids are quite similar. They are specialized for running and for grazing on siliceous grasses, which rapidly wear down the teeth. Species can be differentiated, however, on the basis of qualitative and quantitative characteristics of the skull, tooth morphology and length and robustness of the metapodials (foot bones). There are also variations in size, color, color patterning, hoof size and shape, mane length, presence or absence of a forelock, tail hair length and distribution, number and size of chestnuts and vocalizations.