Seeing that owl in the wild live and getting a great shot like this must have been a thrilling experience. Love the details and the snowy environment in the shot. I do have one small suggestion. I think it would be even more visually stunning if you brought your audience closer to be able to see more details of this owl. Crop closer so that we can feel like we have gotten a closer vantage point to observe this great owl in it's natural environment.
I like the composition and the color palette and the owl is magnificent. Minor nit on the processing: I'd have dodged those subtle catchlights. At first glance his eyes seem lifeless, and I think that extra emphasis on the eye detail would really bring out the intensity of his stare.