Despite what “The Very Hungry Caterpillar” would have you believe, the chrysalis of a caterpillar is not a structure that the bug spins or builds around itself. The chrysalis actually forms under the caterpillar’s skin and is revealed during its last shed! Take a look at this eerie transformation; the skin of the caterpillar splits and unzips revealing the hard, smooth skin of the chrysalis underneath.
Before the chrysalis even emerges, the first parts of the butterfly’s wings are already beginning to develop under the caterpillar’s skin. In the next week, most of the caterpillar’s body will literally dissolve and form back into the anatomy of a butterfly.
The word “chrysalis” is derived from the Greek word chrysós meaning gold. The beautiful gold dots surrounding this Monarch Butterfly chrysalis mark points where air enters the casing, but it’s the common crow butterfly’s metallic chrysalis that really lives up to the name!
Check out the leaf-mimic chrysalis of the orange barred sulfur caterpillar. Camouflage serves as a vital defense in this most vulnerable stage of metamorphosis, though some pupas can even twitch, vibrating their entire chrysalis to scare away pestering predators.
If you want your students to experience the life cycle of a butterfly first hand, you can order these kits that come complete with larvae and all the supplies you need to get them to their pupal- or chrysalis- stage.