Hummingbird and Butterfly Gardening: Where did they go?, 1 by Hineni

Hineni wrote:
As late as Saturday, I had about 18 BST cats on my fennel. Some were getting quite big. Yesterday in the evening, most were gone!!! Now only the littlest ones remain. Where do I look for their chrysalis'? Do they not pupate on the host plant? I've included a pic of the biggest cat as of last Friday.

Wahhh...I wanted to watch one but didn't want to take it too early because I don't have a 'real' caterpiller cage and still didn't find tulle.

Thanks for your help on where to look for the missing cats.

~Sunny