Ark Encounter - Cletus is a zonkey! His mother was a mammoth donkey and his father was a Grant's zebra. They crossed naturally. Since donkeys, zebras, and horses are in the same
Zonkeys, ligers: The sad truth about animal hybrids.
Introducing the Latest Zonkey: Zebra/Donkey Mix - ABC News
Zippy is Britain's second ever zonkey - a donkey-zebra cross - BBC Three