2011, unnamed reporter, What's black and white and kicks like a mule? (in The Daily Mail, 4 July 2011) http://www.dailymail.co.uk/news/article-2010968/Whats-black-white-kicks-like-mule-Meet-baby-donkra--donkey-crossed-zebra.html This donkra was born on Sunday morning to the only zebra in the park.
Source: wiktionary