Until "further notice" or until I receive/discover more "clarfying" info about the different species/types of zebra, I'm going to end the "debate" today with a reminder that horses & donkeys belong to the same genus -
Equus - as zebra, BUT all are different species.
So in contrast to Equus
burchelli (= Plains zebra with several subtypes!), Equus
zebra (= Mountain zebra) or Equus
greyvi (= Desert zebra), Equus (ferus)
caballus refers to a
horse - which developed through the ages from a multi-toed creature to a large one-toed animal.
Zebra are said to be stocky & horse-like in appearance, although zebra ears are larger & rounder than a horse's. However like horses & other ungulates (hoofed mammals),
zebra can turn their ears almost in any direction. The word "zebra" is derived from the Old Portugese "zevra", meaning "wild ass" = Equus
assinus.
It's also said that the "structure" of a zebra is more
pony-like (= half leg + half body) - in contrast to most horses, which are longer in the leg than the body.
However the Plains &
Mountain zebra apparently are "closer" related to the horse than a donkey . . .
. . . whereas the Grevy's (= Desert) zebra is said to be more closely related to the
donkey, mainly because they "share" large ears.
Cross-breeding between a horse & donkey (done because they are closely related) results in a mule, whereas a horse & zebra can also be cross-bred, as well as a donkey & zebra - resulting in a
zonkey (or zebonkey).
