Greg Miller ID'd this mystery moth photographed on Thursday by Regina Geoghan as a Nessus Sphinx Moth, and it sure looks like he is right.
Turns out that another species of diurnal moth (below) was in the DeKorte Butterfly Garden the same day, and photographed by Sandy Sorkin. This guy appears to be a Hummingbird Clear-winged Moth.
We'll look for both these guys on our Butterfly Beginners Walk, beginning with a short talk and slide show at 1 p.m. tomorrow (Sunday).
Great blog post on diurnal moths by moth expert/author Seabrooke Leckie is here.