
Until this morning, I only had one- the one on the right. It was freezing this morning (I literally found ice, due to our little micro-climate here in the valley, which always makes it colder, as if it weren't cold enough in Wisconsin,) and I noticed that the thermometer said it was sixty or so. It was clearly not sixty, so I opted to replace the thermometer with the spare one in the greenhouse. Except that, when I took the faulty thermometer off of the wall, I found this underneath:

A cute, fuzzy little bat! clinging to the side of the wall under the thermometer.
It took me a few minutes to realize that it was not a faulty thermometer, but rather a thermometer warmed by a fuzzy, warm blooded creature who lived inside of it. I carefully rehung the old thermometer over the bat, and mounted the other one beside it. Now we have a bat house on the right, and a true representation of the outdoor temperature on the left.
Later on, I showed Little Z the bat, took a picture of it for the blog, and once again replaced the thermometer on the wall.
They eat mosquitoes, you know.
