This guy has been keeping our shed free from rodents for the past couple of years. You can just see the top of its head in the third photo.
It took me a little while to figure out why my photos were coming out blurry (despite tripod, MLU, remote timer release, etc)... I finally realised that the blurring was coming from its breathing:
http://www.youtube.com/watch?v=CgIILGgU3Ig
Unfortunately, I haven't seen him in action as yet - hopefully I'll luck out and catch it on camera one day.