My first though was juvy Chipping Sparrow, but then I checked some pictures and it does not seem right.
In the fall, they are even more confusing with the immature Chippings running around. That is a cool bird. I wonder if you have some of ours, they left a few days ago. :)
Well THAT'S pretty cool. Lifer for me. Only, I didn't see it, lol. Bird camera caught it at the stream!