We have two flavors of Junco where I am from, the Slate-colored and Oregon. In Arizona there are a whole bunch more, including the other species called a Yellow-eyed Junco. This Gray-headed version of the Dark-eyed Junco is the closest you can come to the Yellow-eye species. It is almost identical in every way except, you guessed it, having yellow eyes. Here is a great article that talks about the different species and their ranges.