Harris’s Sparrow — near Steelville, Lancaster County; April 12-27, 2009. Photo by Tom Raub. This photo was taken on April 12, 2009.

Harris’s Sparrow — near Steelville, Lancaster County; April 12-27, 2009. Photos by Drew Weber. These two photos were taken on April 20, 2009. Note the difference in the amount of black between the April 12th photo and these two.

Harris’s Sparrow — near Steelville, Lancaster County; April 12-27, 2009. Photos by Jeffery Davis. These two photos were taken on April 25, 2009. Again, note the increasing density of black, especially in the bib.