Some male butterflies seal their mate’s genitalia with a waxy ‘chastity belt’ to prevent future liaisons. But female butterflies can fight back. Could this sexual one-upmanship ultimately result in new species?
Some male butterflies seal their mate’s genitalia with a waxy ‘chastity belt’ to prevent future liaisons. But female butterflies can fight back. Could this sexual one-upmanship ultimately result in new species?