Japanese Beetle

Thank you! It helped.

Definitely not an emerald ash borer. This is a Japanese beetle. Here's another example that also happens to have been spotted in Wisconsin: http://www.projectnoah.org/spottings/684...

Japanese Beetle: http://bugguide.net/node/view/473
http://www.ext.colostate.edu/pubs/insect...

Emerald Ash Borer: http://bugguide.net/node/view/27565
http://www.dec.ny.gov/animals/7253.html

Wikipedia isn't trustable

Actually a Japanese beetle. Emerald ash borer has a different, more elongate shape and green elytra as opposed to the shiny chestnut ones here.
http://en.wikipedia.org/wiki/Japanese_be...