According to wikipedia, A zonkey (also known as zebrass, zebronkey,
zeass, zeedonk, zedonk, zebadonk, zenkey, donbra, donbri, donkra,
zebrinny, zebrula, noochie, clive) is a cross between a zebra and a
donkey. The generic name for crosses between zebras and horses or
asses is zebroid or zebra mule. "Zonkey" is not the technically
correct name for such a cross. The most commonly accepted terms are
zebrinny, zebrula, and zedonk. Donkeys are closely related to
zebras and both animals belong to the horse family. Zonkeys are
very rare.
Breeding of different branches of the equine family, which does
not occur in the wild, results in infertile offspring. The
combination of sire and dam also affects the offspring. A zebrinny
is the offspring of a male horse and a female zebra; a zebrula is
the offspring of a male zebra and a female horse; a zedonk is the
offspring of any zebra and any donkey.
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