We have lots of those up here also Dean. They have a much darker wing and a very distinctive light colored band along the trailing edge of their topwings that can be seen from a long ways off. They come out very early in the spring also. The Tortoise Shells like to winter over in the cracks of log houses and often come right inside through the cracks. I always feed them honey or sugar water when they come awake in winter but they never last long. Here's a shot of one sipping on my floor in 2011.
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