Love those Tiger Swallowtails! Haven't seen too many yet this year. I should see a ton when I visit Grandma in WV next month. You can't have that much Tulip Poplar and not have a healthy Tiger ST population!
In good news, apparently my Pipevine ST caterpillar was molting and I'm somewhat confused and embarrassed as to why I couldn't tell. Usually, the head capsule is noticeably lower and it's obvious. But this guy wasn't. I happened to wake up from my nap to see him just finish up the molt and I pulled the old skin away with my thumbnail to make sure he was fully detached. Then, he shook off the old head capsule on his own. So hopefully, he'll get back to eating and growing and being a healthy caterpillar within hours.