A zonkey is a cross between a zebra and a donkey. “Zonkey” is not the technically correct name for such a cross. The most commonly accepted terms are zebonkey [or zebronkey], zebrinny, zebrula, zebrass, and zedonk [or zeedonk]. Another name that is sometimes used is “zebadonk”. Donkeys are closely related to zebras and both animals belong to the horse family. Zonkeys are very rare. In South Africa, they occur where zebras and donkeys are found in proximity to each other.
A zebroid (also zedonk, zorse, zebra mule, and zebrule) is the offspring of any cross between a zebra and any other equine: essentially, a zebra hybrid. In most cases, the sire is a zebra stallion. Offspring of a donkey sire and zebra dam, called a zebra hinny, or donkra, do exist but are rare. Zebroids have been bred since the 19th century. Charles Darwin noted several zebra hybrids in his works.