My son works at a golf course in Sun Valley, Idaho, where he photographed this beautiful moth. What is it?
Signed, Fascinated by the lovely bug.
This is a Columbia Silkmoth or Glover’s Silkmoth, two subspecies of Hyalophora columbia. We are not skilled enough to tell which subspecies this really is.
The Hyalophora from Sun Valley, Idaho, is Glover’s, Hyalophora columbia gloveri … H. columbia columbia flies further north and east of both the moths depicted. There are state by state checklists on the WLSS. For $40.00 it is an amazing reference.