Help!!!

I’m writing this post in english so I can get more answers, for there is a question that has been bugging me for a couple of days… I’m reading a book by John Ortberg, “Faith and doubt” and I can not understand this one thing… I’m guessing it is an expression:

“This is the state of Illinois, where the state bird is sausage”

What does this mean?!?! *confused* I hope to get some answers soon!