in the area and a handful of them are flying around the yard as I type this. Compare this moth to the similar day-flying sphinx, Nessus Sphinx.
They are huge fans of buddleia (butterfly bush).
I spent a whole lot of time trying to get a decent picture of these little buggers - they never stop flying! BUT, I got lucky. The one on the right came to a landing for about two seconds on a conehead flower, allowing for this shot.