According to Mike Reese, Common Roadside Skippers are not really very common in Wisconsin.
Caterpillar foods: grasses (Wagner)
9/12/2011 I found this caterpillar on a grass leaf near our garage
9/15/2011 closeup of the head
9/16/11 Caterpillar rolled up in a non-grass leaf
The rolled up leaf was kept outside over the winter. I wrapped it in a piece of paper towel and put it in a clay flowerpot, buried in the ground up to the rim, and covered with a clay saucer. I took the pot out of the ground at the end of March 2012, and put the rolled leaf in a jar.
5/23/2012 The butterfly hatched.
5/24/2012 Here’s the rolled up leaf containing the pupa after the butterfly had hatched out
5/24/2012 And this is the inside of the rolled leaf, showing the pupa
Here are a few more photos of adults.