Peninsula State Park, Wisconsin, just after nightfall. That's the full moon rising on the right there, and in the corner is light from my car's headlights.
I was all done for the day and heading home when I heard an odd noise...I rolled down the windows, stopped the car, turned off the heater, and heard these frogs singing so loud I could hardly believe it.
So, there you go. Apologies for the poor quality of the video, the camera had auto-cranked itself up to ISO6400 due to the darkness. I probably shouldn't have shot this at 720p either, but I so rarely shoot video with this camera that it didn't even occur to me to use a lower resolution. Don't bother watching this in HD--it doesn't improve the quality at all. The main point is the sound.
Anyway, enjoy the froggies! :)