Butterflies Have an Extra Stomach Attached to Their Vaginas

One thing you won’t find in the story of the Very Hungry Caterpillar is the part where after transforming into a butterfly, he mates with a female who has a Very Hungry Reproductive Tract waiting to devour his sperm. She has a special digestive organ just for this purpose. It’s so powerful that it could even compete with the gut that let the caterpillar, in his more innocent days, chew through those five oranges.

This sperm-hungry organ is called the bursa copulatrix. In female butterflie

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