Most mammals can trace their origins to a single ancestral species. But in the Caribbean islands of the Lesser Antilles, there is a fruit bat with a far more complex family tree. Artibeus schwartzi’s genome is a hybrid mish-mash of DNA inherited from no less than three separate ancestors. One of these is probably extinct and the other two of which still live on the same island chain. It’s a fusion bat, a sort of fuzzy, winged spork.