I'm glad you asked!
I'm telling you about it here because Zebra butterflies are a testimony to God's wonderful creativity and how His creation fits perfectly together.
You may have never seen them because there are certain conditions that have to be met for them to be around.
First off, they only live near pawpaw trees. You don't have a paw paw tree? Well, that's because they only live in the shade of other trees in "deep fertile bottomland and hilly upland habitat" http://en.wikipedia.org/wiki/Pawpaw .
Ends up that the leaves of pawpaws are a bit toxic to bugs that like to chew on trees, but not to the zebra butterfly caterpillar. And (I read a really long article with a whole bunch of really big words that I couldn't understand - but this is what I figured out) the toxicity of the pawpaw is retained not only in the larvae but in the butterfly too! Because of this, birds don't eat them. They know they taste bad.
It seems to me that it would take a whole lot more "faith" to believe that the pawpaw and zebra butterfly evolved into this relationship than to believe that God was having a lot of creative fun creating this beautiful and beneficial relationship.
