I Smell a Rat

A few nights ago, I left work and walked to my car only to see and smell an uninvited mass on the roof of my car. Since it was really late and dark, I couldn't quite make out what it was and decided to leave it for the next day so that I could attempt to identify it. What I found was a partially digested rodent that something had barfed out along with some seeds. Check it out:

I hope you noticed the tail and fur. I finally scraped the thing off today.