Bird Identification: What kind of parrot/lovebird?, 1 by htop

htop wrote:
This little guy I named Charlie (although I don't know the bird's sex) I saw it arrive in early March for 3 years in a row as it migrated. It is shown here at my neighbor's bird feeder. The photo is very poor because it was taken with an old camera using the telephoto setting. The colors should be much brighter. It usually ate the blooms from the ash trees as well. I now have a Peach-faced Lovebird (Agapornis roseicollis) which it resembles; however, as I recall , it was larger than my lovebird which leads me to think that he is some kind of Amazon parrot which can vary in size from vary in size from about 10 inches to 16 inches. Charlie was more in the 10 inch range, has eye rings and was very friendly. The last time I saw him, he sat on my car hood and chirped at me for about 10 minutes. I came within 1.5 feet of him without him flying off. He flew to the top of my roof, turned around to look at me and gave a loud call before he flew away on his journey northward.

I have not been able to ID him. He is not a Mexican Red Headed Parrot, as known as Green-Cheeked, Red-Crowned, (Amazona viridigenalis) nor a Red-lored Amazon (Amazona autumnalis). I don't believe it is a type of Nyasa Lovebird, AKA Lilian's Lovebird (Agapornis lilianae ) because its bill is not red and the top of its head not so yellow.

Any assistance in IDing Charlie is appreciated.