Observation notes: It fell out of a willow tree onto our deck. I kept it and posted pics in various places online. It was positively identified by the "What's That Bug" website who sent me an email as follows:
"We identified your Hornworm from the family Sphingidae as Smerinthus ophthalmicabased on images on the Sphingidae of the Americassite. Alas this beautiful moth has no common name, and we believe this might be our first image of a Hornworm from this species posted to our site."
I released the caterpillar at the base of the willow tree on 7-16-2019 and it promptly burrowed into the ground.