Indigo Bunting males change colour in the fall...

                                      Male Indigo Bunting - photo by Daniel Irons (Macauley Library)

Here's something I have just learned.   Resplendent blue male Indigo Buntings turn brown in the fall. and look just like the female of the species (see photo below).

                          Female Indigo Bunting - photo by Andrew Newmark (Macauley Library) 

Please comment if you wish.

BarrytheBirder