Pete ………it all depends on what part of the country you saw this bird. Your from Nashville so I presume you saw this bird some where in that vicinity ………………. so my guess is that you saw a Scrub Jay ……….. maybe …..lol
Let me try to find a picture to post ……….Frank

was it like this?……….
or this the Indigo Bunting is a small bird only about 4 1/4 inches long