Inspiring Moth by my Studio

This little moth, and his friends, have been hanging out by the studio door since the weather has warmed up. Look at the shape of the wings and the flipped up tail - such inspiring forms.

I wonder what kind of moth they are.

***Updating to add --The UW-Madison extension entomologist says that it is the lettered Sphinx- Deidamia inscripta and that the caterpillars feed on grape. We have lots of wild grape here.