I like the far wing, lots of detail, snow flying, comp. color in BG, sharpness.
Wish the near wing wasn't pointed quite so much at us, so could see it better. A bit more bank to lower that near wing would have been great.
I think the crop is effective. Because I am sure you wanted to show the snow, you need a fair amount of space in front of the bird to avoid centering it too much, and allow it space to move into. Maybe a small crop from right, but not much.
Charles I too like this dynamic flight pose. I like the snow flying adding tp the perception of great speed. Nice detail and as suggested a larger image would show this even more.
Wish the shot was bigger too to see more detail in the head, agree with the position of the near wing, wish it was up more, but a lovely action shot showing the bird's great manoeuvering skills.