Immature male Indigo Bunting. He has almost reached full Spring plumage at 2 years but not quite. This one won't get to mate this season because it hasn't the full brilliance of older males. He needs to be 2-1/2 to 3 to compete.
Mature male Indigo. Light changes the iridescence of his feathers. (Blinding blue blurred the camera....) These birds define the color "indigo". Not all Indigo Buntings migrate in the Winter.
Photo Courtesy: Joan C. Heidelberg.
Next: Worm Eating Warbler