A magical guide made just for a very special butterfly expert
A Black Swallowtail goes through 4 completely different forms — this is called metamorphosis!
Mom lays tiny pale yellow eggs — usually one at a time — on the leaves of plants like parsley. Each egg is only about 1mm wide, like a tiny dot!
The caterpillar hatches and starts eating! Young ones look like bird poop (yes, really — it's camouflage!). They grow into beautiful green and black striped caterpillars with yellow dots.
The caterpillar forms a chrysalis — a protective shell. Inside, it completely transforms! Everything breaks down and rebuilds into a butterfly. It can be green or brown to blend in.
The adult butterfly emerges! It pumps fluid into its wings, lets them dry, and then takes flight for the very first time. It lives for a few weeks, sipping nectar and finding a mate.
⭐ = stages Andie helped with by raising her butterfly!
Black Swallowtail butterflies are called "parsley worms" when they're caterpillars because they LOVE to eat parsley! But they also eat carrots, dill, fennel, and Queen Anne's Lace.
These plants are all in the same family called Apiaceae. The butterfly mom picks these plants on purpose — she can smell them with her feet! — because the caterpillar needs those specific leaves to survive.
By planting parsley, Andie created a perfect butterfly habitat! 🌟
Things most people don't know about Black Swallowtails!
Young caterpillars have a special orange organ called an osmeterium — when scared, they pop it out like a forked tongue and release a stinky smell to scare away predators!
Butterflies have taste sensors on their feet. When a mom lands on a plant, she can immediately "taste" whether it's the right plant for her eggs without even biting it!
Some chrysalises spend the entire winter in a state called diapause — like a deep sleep — and don't become butterflies until spring! The cold weather actually triggers this!
Female Black Swallowtails look similar to the poisonous Pipevine Swallowtail butterfly. Predators avoid eating them because they look dangerous — even though they're harmless! This is called mimicry.
Some Black Swallowtails migrate hundreds of miles! They fly south in fall and north in spring, just like birds, following the warm weather and blooming flowers.
Inside the chrysalis, the caterpillar literally dissolves into liquid! Its body breaks down completely, then rebuilds itself into a totally different creature. It's basically magic — but science!
Only real butterfly experts can get all 4 right. Are you one?