I've been doing lots of reading about them since we live on a farm and have small children. This is what I came up with from
"Cougars (Puma concolor) also known as puma, mountain lion, panther, catamount, American lion, and mishibijn (Ojibwa), once roamed throughout
Since 1991, the Wisconsin DNR has conducted a standardized system of collecting reports of cougars and other rare mammals. On January 18, 2008 a cougar was sighted near Milton, in Rock County, Wisconsin. The sighting was verified as 'cougar' from the tracks and DNA from a small drop of blood from a cut on the foot. Tracks were also found near Elkhorn, about 23 miles southeast of the Milton sighting. In early 2009, a cougar was sighted in Burnett County. Then in late 2009, a cougar was confirmed via tracks and photos travelling from St. Croix into Dunn County. Tracks and other sightings have also been confirmed in northern Wisconsin in 2010. For more details or to report a cougar observation, visit the DNR's "Cougar Sighting"
This is a picture of one I found on the DNR web site.
I'm really excited that we are going to be able to set up a trail camera to see if we'll see anything like the above picture. Please, if anyone sees one in the area please report it.