Swallowtails are one of the most noticeable butterflies in the Kalamazoo area. They're relatively big, colorful, and they appear early in the season. I think this one is a female Eastern Tiger Swallowtail (Papilio glaucus).
I teach economics at Kalamazoo College. My wife is also an economist. We were on sabbatical in Europe for the 2014-15 academic year. (Salamanca, Spain, followed by Oxford, UK.) We were in Uruguay for the 2006-7 academic year.