Just for fun - what kind of butterfly?

I'm testing something with my assorted technology, and to test it I need to publish a blog post, and I can't wait until tomorrow, so here's a question:  Do you know what kind of butterfly this is? If you answered monarch, you're close, but this is actually a viceroy.  It has an extra stripe on its lower wings.  I rarely see viceroys, and when I saw this butterfly it seemed a bit different from the monarchs that flit all over our yard, and my hunch was right! What a cool surprise!