Black-throated Blue Warbler, adult male, Green Lake County, 8 May 2013.
Black-throated Blue Warbler, adult female, Milwaukee County, 10 May 2015
Black-throated Blue Warbler, adult male, Milwaukee County, 10 May 2015
Black-throated Blue Warbler, adult, Backyard feeder, Green Bay, Brown Co., 11 May 2016