Hi JC, great attentive stare from the owl, and you have brought out the plumage nicely. Comp wise, I would maybe take a bit off the right and add to the left, as the owl is looking down that way. Im not familiar with this owl, but has the flash interferred with the colour of his eyes.
I like the pose, perch, sharpness, BG and flash work. I agree with Stuarts composition suggestion and Enrique's suggestion to tone down the bright areas. Great owl series Juan!