Bilateral gynandromorphism is a pretty rare occurrence where an animal is a half-male, half-female, split right down the middle. Like this common blue butterfly - male on left, female on right. Weird! But seriously wonderful…

Very excited this is going to be in my big children’s nature book for autumn 2023 which I start writing next week.

#nature #wildlife #butterfly #entomology #AmWriting #ChildrensBooks
Photo: Burkhard Hinnersmann / Wikimedia Commons