The hermit thrush (Catharus guttatus) has, in my opinion, one of the most beautiful songs. In the spring and summer months, they are a common sound in the northwoods; I have heard the flutelike call lilt through an otherwise silent jackpine forest, and it's an experience I won't soon forget.
Now, however, is not the time for birdsong: it's migration season, when our summer birds head south for the winter. This hermit thrush was likely passing through, on its way to warmer places; perhaps it flew all the way from a boreal forest north of Lake Superior. It saddens me to know that its life and journey were cut short by our window – a window that has never caused trouble for birds before, but now has decals to keep this from happening again.
See also: Moving Closer, from September 11, 2010.