This Masked Shrew was stuck in our cold room yesterday. Shrews are insectivores, will kill and eat young mice, and are normally nocturnal. The Masked Shrew is the most common shrew in North America. So far, I’ve seen 23 mammal species this year, but I wasn’t expecting any shrew species.
Prairie Birder 
neat capture!
I don’t know that the cold room is where you really want to find one, but that’s a neat find. I’ve never seen one myself.