Butterfly from Denali National Park - Limenitis arthemis
Alaska, USA July 17, 2005
As noted, I saw this guy at the end of the road in Denali National Park between Anchorage and Fairbanks, Alaska near the end of July/2005. I figured he's be easy to identify with those colorful spots, but the only butterfly book we had used monochrome plates. You can see a large resolution image of him at the bottom of this page:
http://www.komar.org/faq/travel/hummingbirds/