These are my favorite caterpillars and I like finding them in the backyard. The first sign is when I find a leaf on my native Kentucky spicebush (Lindera benzoin) cut and folded like this.
When I open the leaf, I usually see a small spicebush swallowtail caterpillar (Papilio troilus).
In a week or so, I often find a large leaf folded in half like this.
When I open the leaf, this is my special treat.
Isn’t it a cutie? Those are false eye spots and the head is actually hidden under what looks like a mouth, but isn’t. The face is supposed to look scary – especially to critters looking for a meal.
The folded leaf is created by a web spun by the caterpillar. It hides there in the daytime and comes out at night to eat.
Eventually, the caterpillar changes into a chrysalis and emerges as a spicebush swallowtail butterfly. These butterflies only lay their eggs on spicebush or sassafras (Sassafras albidum) plants.
Spicebush is one of my favorite native Kentucky shrubs. I appreciate the small yellow blooms that are one of the first signs of spring, and I like the delightful spicy smell of the leaves. And, it’s the host of my favorite caterpillar!
6 comments ↓
Oh, I really like him/her! But a couple of questions:
If “the head is actually hidden under what looks like a mouth, but isn’t” – am I understanding correctly that
both the “eyes” and the “mouth” are camouflaging attributes? And, “if the head is hidden under the mouth” but I don’t see it, is it just invisible or is it physically under “the canvass” on which the mouth is displayed?
Yes, Beth, the false eye spots and mouth are for camouflage purposes. The head is visible when the caterpillar is feeding but is otherwise hidden under the false mouth. Thanks for asking.
Great photos as usual! This is one of my favorite caterpillars as well. Looking forward to my first emergence coming in a week or so! Thanks for sharing your passion!
Great to hear from you, Richard. Hope you get to witness the arrival of at least one of those brand new butterflies. And sharing a passion adds to the fun.
I had my first experience with a Spicebush caterpillar this summer…what a treat. He is just beginning to pupate. Thank you for your blog.
Onnie, Thanks for your comments. Glad to have another spicebush fan on board.
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