We're the Badgers . . . gotta love it.
We weren't actually named after the animal, we were named (I don't remember the exact story, so forgive me) after the miners who originally settled in southern Wisconsin -- they found that the best homes were dugouts in the hills, and soon after that people started referring to them as "badgers."
Here's a little bit of Bucky Badger history for you:
http://www.uwbadgers.com/traditions/bucky_badger.aspx
Other Big Ten mascots:
Does anybody know exactly what a Nittany Lion is?
When I was little, I accidentally referred to Purdue's mascot as "the Waterheaters" instead of "the Boilermakers."
In high school our mascot was "the purgolder" . . . I still don't know what that is. I can top that, though -- a nearby high school's athletic teams were known as "the goslings," i.e., the baby geese. Intimidating! But best of all was my middle school mascot. I went to Georgia O'Keeffe Middle School -- our mascot was "the Fighting Iris." You know, like the Notre Dame mascot, only Georgia O'Keeffe was famous for painting flowers, so . . .? Super-lame . . . but funny.