In South Africa, local legend has it that the elephants like to get drunk. They seek out the marula tree, overindulge on its sweet fruits, and enjoy the intoxicating effects of the slightly fermented juice.  Tales of the tipsy pachyderms go back at least two centuries. In the 1830s, a French naturalist called Adulphe Delegorgue described stories from his Zulu guides of mysteriously aggressive behaviour in male elephants after they fed on the marula fruits. “The elephant has in common with man a predilection for a gentle warming of the brain induced by fruit which has been fermented by the action of the sun,” wrote Delegorgue.