This stag beetle is a bilateral gynandromorph: The left half of its body is male; the right half is female.
I explore bilateral gynandromorphism in my new book, A Billion Years of Sex Differences - out tomorrow!
swiftpress.com
In A Billion Years of Sex Differences, evolutionary psychologist Steve Stewart-Williams tackles some of science’s most controversial questions: How do men and women differ? Where do the differences come from? And how do they shape modern life? The result is the most up-to-date, balanced, and engagin…