Make the head at least 15% smaller. The body might be fine, just a little smaller would be alright. One way to make him smaller would be the legs be at less of an angle. His shins are alright, but his thighs should be horizontal, not upward at the angle you have them at. Wings could be a little smaller, too. Limbs might need to be thinner, but not by too much.
EDIT: Made a quick sketch of what is a good size IMO. Yes, I know some parts are off, but I thought a reference of the size I suggested would be helpful.
EDIT: Made a quick sketch of what is a good size IMO. Yes, I know some parts are off, but I thought a reference of the size I suggested would be helpful.