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My backyard just has weeds grass.  Today during a frenzy of weed pulling, I discovered this caterpillar.

The kids crowded around trying to see it.  Pumpkin loved it although many times she narrowly missed stepping on it.  Honey, my bug gal, wanted to pick it up but I stopped her.  Pumpkin calls it a "a-da-da"–it’s awfully cute to hear. 

If anyone can figure out what this is, please tell me.  I’ve searched and haven’t found it yet.  I need a better field guide.

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ETA:  It’s a black swallowtail.  I wonder if I could find it tomorrow and put it in a container of sorts.