Very exciting sighting! On a trip to survey the park for the San Mateo County Birding Guide.
Really, I was just fooling around with my iPhone camera to see if I could get a picture of the moth pressed against our sliding door, attracted to the lights inside the house. But then I got a useable photo from the bunch, and the moth was cooperative, such that I could measure it - 2 centimeters with its wings spread.
This one was deceased
In its natural habitat
No pictures, no access to digital camera