Glad you’ve got a good population of Monarchs. Don’t hate me, but I killed a good DOZEN of the Tomato Hornworms this season - they turn into the Hummingbird Moths later in their life cycle. There is no, ‘Hornworm Re-Location Program’ in Wisconsin, LOL!
I’m sorry, it was them or my beloved tomatoes, and the tomatoes won!
One of the Hornworms was 6” long, and fat as a Cuban cigar. YUCK! We only get them once in very wet Spring seasons up here - and we had an exceptionally wet Spring this time around.