Could this be what has been chewing on my petunias?
Obviously, yes.

I originally thought that the odd damage to so many of my flowers was being done by Japanese Beetles. That was until I found this caterpillar crawling out of one of the ragged blooms. How did I miss seeing this before? He's pretty big. I check my plants very closely every single day. This is a new pest for me... So far, he's the only caterpillar I've found. But I also haven't seen very many Japanese Beetles either. However, so many plants have so much damage. Something strange is going on. And I have a feeling this may be part of it.

Bad News SEPTEMBER UPDATE:
The Moth https://pbase.com/britestar/image/173997167