I had this posted on the insect forum and it was suggested I post it here too. Found in Michigan. Any guesses?
White lined sphinx moth caterpillars are quite variable, but one of its forms looks like your caterpillar.
Here is a link that might be useful: White Lined Sphinx Caterpillar
It's unanimous then! The other poster thought the same. Thanks so much!
Congrats:) Probably looking for a place to call home for the Winter...
They're very attracted to common Hostas for nectar in the Summer. Very pretty moth.