This sparrow is significant because it was the subject of the first Teaser ever, posted on Labor Day 2008.
Oh, you want to know what kind of sparrow? We believe it is a young Song Sparrow. (Did not see that coming, did you?) Fortunately, the 4.5 years of Tuesday Teasers since then have been for the most part easier.
Thanks to all who offered IDs, and to all who have followed the Teasers over the years.