Dear John
Sorry to say that this rather nice looking moth is the squash vine borer moth. Next time you see it, squash it!
Time to check your squashes, esp the zucchini for evidence of the borer/eggs. The borers will bore in at a leaf axil then head inside the stem to the root area to eventually pupate. You might want to spray some Spinosad on the stems and leaf axils in late day...try hard not to hit any blossums that might have bees in them.
Good luck!!
Great photo so every one here knows what the adult looks like!!
(Copied this from blog to share with others. Thanks)
