My daughter and I spent some time yesterday watching hundreds of butterflies at the Geneva Park District's Butterfly House, located west of town at Peck Farm Park. I sat quietly on one of the benches for a pretty long time before this butterfly landed nearby. If you haven't visited yet this summer, I hope you find some time to experience this peaceful spot for yourself. The house is open daily, and the suggested donation is $2.00 per visitor or $5.00 per family.
(I think this one might be a Spicebush Swallowtail.)