I love to photograph orioles.. even the young are fun to watch.
50D, 400DO at F7.1 -.67 and -1 2/3 stop on BBeamer 1/1000 Iso 500
Removed some stuff I didn't like.
Nice pose, sharpness,HA. Nice flashwork to bring up the color.
I agree with Thomas about the leaf, and might try to burn it in, as well as the bright stem and stick by the tail.
That will focus more attention on the bird IMO.