We've been seeing them flutter about our local park for the past 3 or 4 weeks; this is the first that stayed still long enough to unlimber a camera. The park abounds with the larva's favorite foods, hazel, blackberry and thimbleberry. The park is a mix of mowed grass and Douglas fir - bigleaf maple forest, at sea level.

For a higher-resolution image, see https://www.flickr.com/photos/35195017@N06/13962365613/.